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                                   EXHIBIT 2.1
                                DATED MAY 3, 1999
                           ROSLIN INSTITUTE AND OTHERS
                                     - and -
                                GERON CORPORATION
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                           SALE AND PURCHASE AGREEMENT
                                 - relating to -
                           the issued share capital of
                             Roslin Bio-Med Limited
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                                  DX: 41 LONDON
                                Draft:4: 05/15/99
                                  Ref: SXW/MXR
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                                      INDEX
CLAUSE NO.                                                           PAGE NO.
                                                                  
         1. DEFINITIONS AND INTERPRETATION..........................     1
         2. SALE AND PURCHASE.......................................     9
         3. CONSIDERATION...........................................    10
         4. VENDORS' WARRANTIES.....................................    10
         5. LIMITATIONS TO THE WARRANTIES...........................    12
         6. PURCHASER'S WARRANTIES..................................    19
         7. COMPLETION..............................................    19
         8. COVENANTS OF THE PURCHASER AND THE VENDORS..............    22
         9. RESTRICTIONS............................................    23
         10. CONFIDENTIALITY........................................    26
         11. RESTRICTIVE TRADE PRACTICES ACT........................    27
         12. NOTICES................................................    27
         13. MISCELLANEOUS..........................................    30
         14.WARRANTORS' REPRESENTATIVE..............................    28
         15. LAW AND JURISDICTION...................................    36
SCHEDULES
        1.      The Vendors and the Consideration Shares
        2.      The Company
        3.      The Company IPR
        4.      Representations and warranties of the Warrantors
        5.      Conditions to Completion
        6.      Representations and warranties of the Purchaser
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THIS AGREEMENT is made the 3rd day of May, 1999
BETWEEN
(1)      THE PERSONS whose names and addresses are set out in columns 1 and 2 of
         schedule 1 (collectively the "Vendors" and severally a "Vendor"); and
(2)      GERON CORPORATION whose place of business is at ▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇,
         ▇▇▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇ (the "Purchaser").
INTRODUCTION
(A)      Roslin Bio-Med Limited is a private company limited by shares
         incorporated in Scotland, further details of which are set out in
         schedule 2 (the "Company").
(B)      The Vendors are the registered shareholders of all of the issued share
         capital of the Company in the proportions set out against their names
         in column 3 of schedule 1.
(C)      Subject to the terms and conditions of this agreement the Vendors have
         agreed to sell and the Purchaser has agreed to purchase all of the
         issued share capital of the Company.
AGREED TERMS
         1.       DEFINITIONS AND INTERPRETATION
                  1.1      In this agreement:
         "ACCOUNTING REQUIREMENTS" means the accounting requirements of the
         Companies Act, SSAPs, FRSs, abstracts of the Urgent Issues Task Force,
         any other requirement of a United Kingdom accounting body having
         mandatory effect, FREDs and other generally accepted accounting
         principles and practices in the United Kingdom to the extent applicable
         and in force in relation to the Company as at the Completion Date;
         "ACCOUNTS" means the audited accounts of the Company for the financial
         year ended on the Accounts Date including the auditors' and directors'
         reports, the audited balance sheet as at the Accounts Date, the audited
         profit and loss account for such period and the notes to them;
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         "ACCOUNTS DATE" means 28 February 1999;
         "AFFILIATE" means, in respect of any person:
         (a)      any person connected with such person (and "connected with"
                  bears the meaning set out in section 839 of ICTA); and/or
         (b)      any company under the control of such person (and "control"
                  bears the meaning set out in section 840 of ICTA); and/or
         (c)      any associated company of such person (and "associated
                  company" bears the meaning set out in section 416 of ICTA);
         "BUSINESS DAY" means any day other than a Saturday, Sunday or any day
         which is a public holiday in any of the countries referred to in
         sub-clause 12.2;
         "BUSINESS HOURS" means the hours of 09.00 to 17.30 on a Business Day in
         the place to which any notice or other written communication is sent
         pursuant to this agreement;
         "CAA" means the Capital ▇▇▇▇▇▇▇▇▇▇ ▇▇▇ ▇▇▇▇;
         "COMPANY'S ACCOUNTANTS" means ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ of ▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇
         ▇▇▇▇▇▇, ▇▇▇▇▇▇▇, ▇▇ ▇▇▇;
         "COMPANIES ACT" means the Companies ▇▇▇ ▇▇▇▇;
         "COMPANY IPR" means:
                           (a) the patents, applications and supplementary
                           certificates for patents listed in the Warrantors'
                           Disclosure Letter and any other patents, applications
                           and supplementary certificates for patents registered
                           or applied for in any part of the world in respect of
                           the same inventions as those patents, applications
                           and supplementary certificates set out in Part A of
                           schedule 3 (whether or not claiming priority from any
                           such patents and/or applications) (together
                           "PATENTS"); and
                           (b) the trademarks listed in Part B of schedule 3 and
                           all other business names, brand names, trade marks
                           (whether in fancy script or otherwise), devices,
                           logos, get up and signs (and whether or not
                           registered or applied for) owned by the Company
                           together with all goodwill associated with or
                           symbolised by any of the foregoing (together
                           "TRADEMARKS");
                           (c) all ideas, concepts, inventions, unpatented
                           drawings, designs, models, specifications, data,
                           formulae, processes and procedures, techniques and
                           any other technical information or documentation
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                           (including computer stored information and
                           documentation) owned or co-owned by or under the
                           control of the Company which is secret and
                           substantial ("KNOW-HOW"); and
         (d)      all database rights;
         "COMPLETION" means completion of the sale and purchase of the Sale
         Shares in accordance with the parties' respective obligations under
         clause 7;
         "COMPLETION DATE" means the date of Completion as set out in sub-clause
         7.1;
         "COMPUTER SYSTEM" means the computer systems, including all its
         equipment, hardware, firmware, software and accessories used in the
         business of the Company;
         "CONDITIONS" means the conditions precedent to Completion contained in
         schedule 5;
         "CONFIDENTIAL INFORMATION" means all confidential technical, commercial
         and other confidential information, know-how, experience, knowledge and
         skill relating to the business of the Company as at the Completion Date
         including (without prejudice to the generality of the foregoing) all
         research and development drawings, formulae, processes, specifications,
         trade secrets, test reports, operating and testing procedures,
         practices, listings, instruction manuals, tables of operating
         conditions, lists and particulars of customers and suppliers, marketing
         methods, pricing, credit and payment policies, profit margins,
         discounts and rebates (if any);
         "CONSIDERATION SHARES" means 2,100,000 ordinary shares in the capital
         of the Purchaser's common stock at $0.001 par value to be issued
         credited as fully paid, being the 3i Consideration Shares and the
         Escrow Shares;
         "DAMAGES" means losses, damages, liabilities fees and costs (including
         legal costs) and expenses reasonably and properly incurred;
         "DISCLOSED" means disclosed with sufficient clarity and detail to
         enable the Purchaser to assess the financial and commercial impact on
         the Company of the matter disclosed;
         "ENCUMBRANCE" means any mortgage, charge, lien, pledge, hypothecation,
         assignment by way of security, equity, claim, right of pre-emption,
         option, covenant, restriction, reservation, lease, trust, order,
         decree, judgment, title defect (including retention of title claim),
         valid and enforceable conflicting claim of ownership or any other third
         party right or encumbrance of any nature whatsoever (whether or not
         perfected);
         "ESCROW AGENT" means U.S. Bank Trust National Association or such other
         institution selected by unanimous agreement of the Warrantors'
         Representative and the Purchaser to act as an escrow agent;
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         "ESCROW AGREEMENT" means the escrow agreement in the agreed form;
         "ESCROW FUND" means the escrow fund established pursuant to the Escrow
         Agreement in respect of the Escrow Shares;
         "ESCROW SHARES" means the First Escrow Shares and the Second Escrow
         Shares;
         "FINANCIAL YEAR" shall be construed in accordance with section 223 of
         the Companies Act;
         "FIRST ESCROW SHARES" means 860,000 of the Consideration Shares to be
         issued to the Warrantors as shown in column 4.2(a) of schedule 1;
         "FREDS" means the financial reporting exposure drafts issued by the
         Accounting Standards Board Limited;
         "FRSS" means the financial reporting standards established by the
         Accounting Standards Board Limited;
         "GOVERNMENT ENTITY" means any court, administrative agency, commission
         or other governmental authority;
         "HAZARDOUS MATERIALS" means wastes, pollutants, contaminants,
         petroleum, petroleum products, dangerous, hazardous or toxic substances
         and materials (including liquids, solids, gases, ions and noise and
         substances prescribed in schedules 4, 5 and 6 of the Environmental
         Protection (Prescribed Processes and Substances) Regulations 1991)
         which may be harmful to human health or other life or the environment
         or a nuisance to any person;
         "ICTA" means the Income and Corporation Taxes ▇▇▇ ▇▇▇▇;
         "IHTA" means the Inheritance Tax ▇▇▇ ▇▇▇▇;
         "INTELLECTUAL PROPERTY" means all patents and supplementary
         certificates, registered designs, know-how, rights in trade secrets and
         confidential information; registered or unregistered trademarks,
         service marks and applications therefor and all other business names,
         brand names, devices, logos, (and whether or not registered or applied
         for) with all the goodwill associated with or symbolised by any of the
         foregoing; all other inventions (whether or not capable of protection
         by patent or other form of registration); all copyright, rights in the
         nature of copyright, sui generis rights, design rights, moral rights
         and all other like rights in all parts of the world whether present or
         vested future or contingent; all other intellectual property rights
         throughout the world for the full term of the rights concerned and
         including: all registrations and pending registrations relating to any
         such rights and the benefit of any pending applications for any such
         registrations; all reversions, extensions and renewals of such rights;
         and all accrued rights of action in relation to such rights (including
         the right to ▇▇▇ for and recover damages for past infringements);
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         "LICENCES" means the licences, agreements, contracts, permissions
         listed in part C of schedule 3 being legal arrangements pursuant to
         which the Company is entitled to utilise any Intellectual Property
         owned by any third party;
         "LICENSORS" means the licensors under the Licences;
         "LICENCE AGREEMENT" means the licence agreement in the agreed form;
         "MATERIAL" means with respect to any event, change, condition or effect
         any material event, change, condition or effect related to the
         condition (financial or otherwise), properties, assets (including
         intangible assets), liabilities, business, operations, results of
         operations or prospects of an entity or group of entities;
         "MATERIAL ADVERSE EFFECT" means with respect to any entity or group of
         entities any event, change or effect that, when taken individually or
         together with all other adverse changes and effects, is or is
         reasonably likely to be materially adverse to the condition (financial
         or otherwise), properties, assets, liabilities, business, operations,
         results of or prospects of such entity and its subsidiaries, taken as a
         whole, or to prevent or materially delay consummation of the
         transactions contemplated under this agreement or otherwise to prevent
         such entity and its subsidiaries from performing their obligations
         under this agreement;
         "NEW SHARES" means any of the Purchaser's shares or other equity issued
         or distributed by the Purchaser (including shares issued in a stock
         split) which may be issued on or after Completion to the Warrantors in
         addition to the Escrow Shares;
         "OPTION EXCHANGE AGREEMENT" means the option exchange agreement in the
         agreed form;
         "OPTION SHARES" means that those shares in the Company over which
         options have been granted as set out in column 5 of schedule 1;
         "PATENTS ACT" means the Patents ▇▇▇ ▇▇▇▇;
         "PURCHASER'S ACCOUNTANTS" means Ernst & Young of ▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇
         ▇▇▇▇▇▇, ▇▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇;
         "PURCHASER'S DISCLOSURE LETTER" means the disclosure letter in the
         agreed terms of even date given by the Purchaser to the Vendors;
         "PURCHASER'S SOLICITORS" means ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇ of Carmelite, ▇▇
         ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇▇, ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇;
         "PURCHASER'S TRANSFER AGENTS" means US Stock Transfer Corporation;
         "PURCHASER'S WARRANTIES" means the representations and warranties set
         out in schedule 7;
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         "REGISTRATION RIGHTS AGREEMENT" means the registration rights agreement
         in the agreed form;
         "RELEVANT DATE" means:
         (a)      in the case of the Warrantors other than the Roslin Institute
                  the Completion Date;
         (b)      in the case of the Roslin Institute the sixth anniversary of
                  the Completion Date or if earlier the date upon which the
                  Research Agreement terminates;
         "RESEARCH AGREEMENT" means the research funding agreement in the agreed
         form;
         "RESTRICTED ACTIVITY" means:
         (a)      in the case of the Warrantors other than the Roslin Institute,
                  the business of the Company as at the Completion Date;
         (b)      in the case of the Roslin Institute, the Restricted Field;
         "RESTRICTED FIELD" means activities relating to cell based systems for
         the cloning of animal and human cells and non-human animals;
         "ROSLIN INSTITUTE" means the Roslin Institute of ▇▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇▇▇
         ▇▇▇▇▇▇, ▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇, ▇▇▇▇ ▇▇▇;
         "SALE SHARES" means all of the issued A, B, C and D ordinary shares in
         the Company, details of which are set out in column 3 of schedule 1;
         "SECOND ESCROW SHARES" means 315,000 of the Consideration Shares issued
         or allocated to the Warrantors as shown in column 4.2(b) of schedule 1;
         "SECURITIES ACT" means the US Securities ▇▇▇ ▇▇▇▇, as amended;
         "SOFTWARE" means all computer programs and all related object code and
         source code and databases used by the Company in connection with its
         business;
         "SSAPS" means the statements of standard accounting practice adopted by
         the Accounting Standards Board Limited;
         "STOCK EXCHANGE" means London Stock Exchange Limited;
         "SUBSIDIARY" means a subsidiary company as defined in section 736 of
         the Companies Act;
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         "3i" means 3i Group Plc (Reg No 1142830) of ▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇▇,
         ▇▇▇ ▇▇▇, being one of the Vendors;
         "3i CONSIDERATION SHARES" means 1,240,000 of the Consideration Shares
         to be issued by the Purchaser in favour of 3i at Completion;
         "TCGA" means the Taxation of Chargeable Gains ▇▇▇ ▇▇▇▇;
         "TAXATION" means all forms of taxation, charges, duties, costs,
         imposts, levies and rates whenever imposed and whether of the United
         Kingdom or elsewhere and whether chargeable directly or primarily
         against or attributable directly or primarily to the Company or to any
         other person, including without limitation, income tax (including
         income tax or amounts equivalent to or in respect of income tax
         required to be deducted or withheld from or accounted for in respect of
         any payment), withholding taxes, corporation tax, advance corporation
         tax (including amounts corresponding to or representing advance
         corporation tax), capital gains tax, capital transfer tax, inheritance
         tax, value added tax, customs duties, excise duties, insurance premium
         tax, landfill tax, stamp duty, stamp duty reserve tax, national
         insurance, social security or other similar contributions, and
         generally any tax, duty, impost or levy or other amount and any
         interest, penalty or fine in connection therewith but expressly
         excluding, for the avoidance of doubt, community charges and rates;
         "TAXATION AUTHORITY" means any local, governmental, state, federal or
         other fiscal, revenue or excise authority, body or official whether in
         the UK or elsewhere including without limitation, the Inland Revenue
         and HM Customs and Excise;
         "UK PAYE" means any tax liability pursuant to regulations made by the
         Board of Inland Revenue under section 203 ICTA 1988;
         "VAT" means value added tax;
         "VATA" means the Value Added Tax ▇▇▇ ▇▇▇▇;
         "VENDORS' AFFILIATE" means an Affiliate of any Vendor but excludes the
         Company;
         "COMPANY'S SOLICITORS" means Dundas Wilson of Salture Court, ▇▇ ▇▇▇▇▇▇
         ▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇, ▇▇▇ ▇▇▇;
         "WARRANTORS' DISCLOSURE LETTER" means the disclosure letter in the
         agreed form of even date given by the Warrantors to the Purchaser;
         "WARRANTORS' REPRESENTATIVE" means a committee constituting the
         following individuals ▇▇▇ ▇▇▇▇ and ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇;
         "WARRANTIES" means the representations and warranties set out in
         schedule 4;
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         "WARRANTORS" means the Vendors other than 3i; and
         "YEAR 2000 COMPLIANT" means, in relation to the Software each part of
         the Computer System and any asset used in the business of the Company
         which relies upon computer hardware, firmware, software or other
         information technology, that neither its performance nor its
         functionality is or will be affected by dates prior to, during or after
         the year 2000, and in particular:
         (a)      no value for current date causes or will cause any
                  interruption in its operation;
         [(b)     no value for any date element in any data used as input by the
                  software cause or will cause any interruption in the operation
                  of the software, which will either correctly interpret the
                  date element (where it is a valid date) or else detect and
                  report it as an invalid date and continue processing
                  accordingly;]
         (c)      date-based functionality behaves and will behave consistently
                  for dates prior to, during and after year 2000 and produces
                  [and will produce correct results in accordance with the
                  software's specifications];
         (d)      in all interfaces and data storage, the century in any date is
                  and will be specified either explicitly or by unambiguous
                  algorithms or inferencing rules; and
         (e)      the year 2000 is and will be recognised as a leap year.
                  1.2      In this agreement references to:
                           (a)      an enactment includes a reference to:
                                    (i)      that enactment as amended, extended
                                    or applied by or under any other enactment
                                    before the date of this agreement;
                                    (ii)     any enactment which that enactment
                                    re-enacts (with or without modification);
                                    and
                                    (iii)    any subordinate legislation made
                                    before the date of this agreement under any
                                    enactment, including an enactment referred
                                    to in sub-clause 1.2(a) (i) or (ii) above;
                           (b)      the singular includes a reference to the
                           plural and vice versa;
                           (c)      any clause, sub-clause or schedule is to a
                           clause, sub-clause or schedule (as the case may be)
                           of or to this agreement;
                           (d)      any gender includes a reference to all other
                           genders;
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                           (e)      persons include any form and all forms of
                           legal entity including individuals, companies, bodies
                           corporate (wherever incorporated or established or
                           carrying on business), unincorporated associations,
                           governmental entities and partnerships and, in
                           relation to any party who is an individual, his legal
                           personal representative(s);
                           (f)      the words "including", "include" and "in
                           particular" shall be construed as being by way of
                           illustration only and shall not be construed as
                           limiting the generality of any foregoing words; and
                           (g)      documents "in the agreed form" are to
                           documents in the form of the draft agreed between the
                           parties to this agreement prior to Completion and
                           initialled by or on behalf of the parties for the
                           purposes of identification.
                  1.3      In part D of schedule 4 reference to a section only
                  is to a section of the ICTA, reference to a schedule with a
                  number is to a schedule of ICTA and reference to an Act
                  followed by a year is to the Finance Act of that year.
                  1.4      The introduction and schedules form part of this
                  agreement and shall have the same force and effect as if
                  expressly set out in the body of this agreement. Accordingly,
                  any reference to this agreement shall include the introduction
                  and schedules.
         2.       SALE AND PURCHASE
                  2.1      Subject to the satisfaction or waiver of the
                  provisions of schedule 5 and implementation of Clause 7, each
                  of the Vendors with full title guarantee shall sell the number
                  of Sale Shares set out against such Vendor's name in column 3
                  of schedule 1 and the Purchaser shall purchase all right,
                  title and interest in the Sale Shares with effect from
                  Completion.
                  2.2      Each of the Vendors shall sell the Sale Shares free
                  from all Encumbrances and together with all rights to
                  dividends and other distributions of whatsoever nature
                  declared after the date of this agreement in respect of such
                  Sale Shares and all other rights and advantages belonging to
                  or accruing on such Sale Shares as at and from that date.
                  2.3      Neither the Purchaser nor the Vendors shall be
                  obliged to complete the sale and purchase of any of the Sale
                  Shares unless the sale and purchase of all the Sale Shares is
                  completed simultaneously.
                  2.4      Each of the Vendors hereby irrevocably waives all or
                  any pre-emption or other rights which that Vendor may have
                  pursuant to the Company's articles of
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                  association or to any other agreement relating to the Sale
                  Shares or otherwise, so as to enable the sale of the Sale
                  Shares to the Purchaser to proceed free of any such
                  pre-emption or other rights.
         3.       CONSIDERATION
                  3.1      The total consideration for the sale of the Sale
                  Shares and the Option Shares shall be the issue of the
                  Consideration Shares to the Vendors as contemplated by this
                  agreement and the Option Exchange Agreements.
                  3.2      The 3i Consideration Shares shall be issued to 3i on
                  Completion.
                  3.3      The Escrow Shares shall be issued to the Warrantors
                  on Completion in the amounts shown against the respective
                  names of the Warrantors in column 4.2 of schedule 1 (other
                  than those to be issued in respect of the Option Shares) and
                  shall be subject to the provisions of the Escrow Agreement and
                  this agreement. For the avoidance of doubt, 3i shall not and
                  shall not be required to deposit any of the 3i Consideration
                  Shares issued to it in the Escrow Fund or otherwise grant any
                  Warranties in favour of the Purchaser other than as set out in
                  Part A of schedule 4.
                  3.4      The Consideration Shares to be issued pursuant to
                  this agreement shall not be registered as at Completion under
                  the Securities Act in reliance upon the exemption contained in
                  Regulation S and section 4(2) of the Securities Act and
                  Regulation D promulgated thereunder and in reliance upon the
                  Warranties.
                  3.5      The obligations of the Purchaser, the Company and the
                  Vendors with respect to the registration of the Consideration
                  Shares shall be governed by the Registration Rights Agreement.
         4.       VENDORS' WARRANTIES
                  4.1      Each of the Vendors on its own behalf severally
                  represents and warrants to the Purchaser in the knowledge that
                  the Purchaser is entering into this agreement in reliance upon
                  each of the Warranties contained in Part A of schedule 4 being
                  true and accurate.
                  4.2      The Warrantors severally represent and warrant to the
                  Purchaser in the knowledge that the Purchaser is entering into
                  this agreement in reliance upon each of the Warranties
                  (subject to the limitations contained in clause 5) set out in
                  Parts B, C and D of Schedule 4 being true and accurate.
                  4.3      Subject to the limitations contained in clause 5 if
                  there is a breach of any of the Warranties then, in respect of
                  each such breach and without prejudice to the right of the
                  Purchaser to calculate Damages on any basis available to it
                  but subject to the limitations contained in clause 5 and the
                  other provisions of this agreement, the Warrantors agree that
                  the Purchaser may retain such Escrow Shares and/or New 
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                  Shares or such other property as is retained in the Escrow
                  Fund subject to and in accordance with the Escrow Agreement.
                  The Purchaser agrees with the Warrantors that retention as
                  aforesaid is the only remedy which the Purchaser has and may
                  take against the Warrantors in respect of a breach of this
                  agreement, including the Warranties.
                  4.4      Upon the sale of the Sale Shares by the Purchaser (or
                  any subsequent owner thereof) the benefit of the Warranties
                  may be assigned in whole or in part and without restriction by
                  the person for the time being entitled to them. For the
                  avoidance of doubt, any person to whom the benefit of the
                  Warranties is assigned shall be subject to the limitations set
                  out in clause 5 and the other applicable provisions of this
                  agreement.
                  4.5      Each of the Warranties shall be construed as a
                  separate and independent warranty and (subject to clause 5)
                  shall not be governed, limited or restricted by reference to
                  or inference from any other terms of this agreement or any
                  other Warranty.
                  4.6      Any payments or deemed payment made by the Vendors to
                  the Purchaser in respect of claims under the Warranties shall
                  so far as possible be treated by the parties as a reduction in
                  the consideration for the Sale Shares received by the Vendor
                  or Vendors which made the payment or deemed payment.
                  4.7      In this agreement any reference to a Warrantors
                  "knowledge", "awareness", "information" or "belief" means such
                  knowledge, awareness, information or belief as that party
                  would have after having made:-
                           (a)      in the case of the Warrantors (other than
                           ▇▇▇ ▇▇▇▇ and ▇▇▇▇ ▇▇▇▇▇) all due and diligent enquiry
                           of the Warrantors (other than ▇▇▇ ▇▇▇▇ and ▇▇▇▇ ▇▇▇▇▇
                           and no other third party or person);
                           (b)      in the case of ▇▇▇ ▇▇▇▇ and ▇▇▇▇ ▇▇▇▇▇
                           reasonable enquiry of ▇▇▇ ▇▇▇▇ and ▇▇▇▇ ▇▇▇▇▇ (and no
                           other third party or person);
                           and if there is a reference to the "knowledge",
                  "awareness", "information" or "belief" of more than one
                  Warrantor all of the relevant Warrantors shall be deemed to
                  have knowledge, awareness, information or belief of each
                  other.
                  4.8      Each of the Warrantors hereby agrees with the
                  Purchaser (for itself and as trustee for the Company) to waive
                  any right which it may have in respect of any
                  misrepresentation, inaccuracy or omission in or from any
                  information or advice supplied or given by the Company or any
                  of its officers and employees or advisers in enabling the
                  Warrantors to give the Warranties, to prepare the Warrantors'
                  Disclosure Letter and to enter into this agreement and
                  undertakes not to make any claim in respect of such reliance.
                                      -11-
   14
                  4.9      Subject to the provisions of paragraph (j) of
                  schedule 6, the rights and remedies of the Purchaser in
                  respect of any breach of this agreement shall not be affected
                  by any investigation made by or on behalf of the Purchaser
                  into the affairs of the Company or actual or constructive
                  knowledge on the part of the Purchaser or its agents or
                  advisers or by any other event or matter whatsoever, except a
                  specific and written waiver or release given by the Purchaser
                  and except as otherwise expressly provided in this agreement
                  in relation to the Warrantors' Disclosure Letter.
                  4.10     All sums payable by the Vendors or the Purchaser
                  under this agreement shall be paid free and clear of all
                  deductions or withholdings unless the deduction or withholding
                  is required by law, in which event the Vendors or the
                  Purchaser (as the case may be) shall pay such additional
                  amount as shall be required to ensure that the net amount
                  received by the Vendors or the Purchaser (as the case may be)
                  will equal the full sum which would have been received by them
                  or it had no such deduction or withholding been required to be
                  made.
                  4.11     Subject to clause 5 if any payment made by the
                  Warrantors in relation to a claim for breach of Warranty which
                  relates to Taxation will be or has been subject to Taxation in
                  the hands of the Purchaser, the Purchaser may demand in
                  writing from the Warrantors such sum (after taking into
                  account any Taxation payable in respect of such sum) as will
                  ensure that the Purchaser receives and retains a net sum equal
                  to the sum which it would have received had the payment not
                  been subject to Taxation. The Warrantors shall pay any such
                  sum which is demanded pursuant to this sub-clause 4.11 within
                  10 Business Days of receipt of a notice from the Purchaser
                  identifying that such Taxation is legally due for payment
                  within 20 Business Days from the date of such notice.
        5.     LIMITATIONS TO THE WARRANTIES
                  5.1      Notwithstanding any other provision of this agreement
                  (but save as acknowledged below), no limitations of any kind
                  whatsoever shall apply to any claim under this agreement or
                  any agreements contemplated hereby against a Vendor:
                           (a)      which is (or the delay in discovery of which
                           is) the consequence of any fraud, dishonesty or
                           deliberate concealment on the part of that Vendor,
                           his or its agents or advisers; or
                                      -12-
   15
                           (b)      which is the result of a breach of any
                           Warranty in Part A of schedule 4;
         it being acknowledged and agreed that the limitation provisions shall
         apply to any claim brought against any of the other Vendors who were
         not a party to such fraud, dishonesty or concealment or to whose Sale
         Shares the breach of Warranty in Part A of the schedule 4 did not
         apply.
                  5.2      The following provisions of this clause 5.2 shall
                  operate to exclude and/or limit the liability of the
                  Warrantors under or in connection with this agreement (where
                  expressly stated) in sub-clauses 5.2 (m) and (s) and the
                  Warranties:
                           (a)      the Warrantors shall not be liable under or
                           by virtue of the Warranties in respect of any matter
                           Disclosed in the Warrantors' Disclosure Letter;
                           provided, however, that any information Disclosed
                           with respect to a particular Warranty in the
                           Warrantors' Disclosure Letter shall be deemed to be
                           Disclosed and incorporated in any other section of
                           the Warrantors' Disclosure Letter where such
                           disclosure would be appropriate;
                   *       (b)      the Warrantors shall have no liability under
                           or by virtue of the Warranties unless and until the
                           aggregate amount of all valid claims by the Purchaser
                           under or by virtue of the Warranties shall exceed 
                           [*] (subject always to the other provisions of
                           this clause 5.2) and in such case the Warrantors
                           shall be liable for the whole of such amount of that
                           claim and not just the excess;
                           (c)      no single claim may be made against the
                           Warrantors under or by virtue of the Warranties
                     *     unless the amount so claimed in respect of that claim
                           shall exceed [*] and any claim of less than that
                           amount shall be disregarded for all purposes but once
                           such amount has been exceeded, the Warrantors shall
                           be liable for the whole of such amount of that claim
                           and not just the excess;
                           (d)      if, but for this clause 5.2(d), the
                           Warrantors would be liable in respect of the same
                           matter under or by virtue of more than one of the
                           Warranties and any sum in respect of that matter is
                           paid under one particular Warranty the liability of
                           the Warrantors (if any) under or in respect of
                           another Warranty in respect of that matter shall be
                           reduced by the amount of such sum;
                           (e)      if the Warrantors pay an amount in respect
                           of any liability under or by virtue of the Warranties
                           and the Purchaser or the Company subsequently
                           recovers from a third party (including, for the
                           avoidance of doubt, any insurance company or any tax
                           authority) a sum which is received as a result of
                           that breach, the Purchaser shall promptly repay or
----------
* Material has been omitted pursuant to a request for confidential treatment. 
  Such material has been filed separately with the Securities and Exchange
  Commission.
                                      -13-
   16
                           procure repayment to the Warrantors of so much of the
                           amount paid by them as, when added to the sum
                           recovered from such third party, exceeds the amount
                           due to the Purchaser or the Company in respect of
                           that breach;
                           (f)      the amount of any claim under or by virtue
                           of the Warranties shall take into account any cash
                           relief from, or cash deductions realised by the
                           Company and the Purchaser in respect of Taxation;
                           (g)      the Warrantors shall not be liable for any
                           claim which would not have arisen, or to the extent
                           that any claim would have been for a lesser amount,
                           except as a result of a voluntary act, default or
                           transaction of the Purchaser or of the Company (save
                           where pursuant to a legally binding obligation
                           existing prior to Completion or in the ordinary
                           course of business) or any permitted successor or
                           assignee of the Purchaser occurring on or after
                           Completion;
                           (h)      the Warrantors shall be under no liability
                           under or by virtue of the Warranties in respect of
                           any matter arising from or connected with any change
                           of the accounting reference date of the Company or
                           any accounting policy or practice of the Company
                           adopted by the Purchaser or the Company after
                           Completion;
                           (i)      the Warrantors shall not be liable in
                           respect of a claim under or by virtue of the
                           Warranties if such claim would not have arisen or
                           would have been made for a lesser amount but for a
                           change or changes in legislation made after
                           Completion;
                           (j)      the amount of any successful claim against
                           the Warrantors under or by virtue of the Warranties
                           shall be deemed to constitute a reduction in the
                           price payable by the Purchaser for the Sale Shares;
                           (k)      the Warrantors shall have no liability to
                           the Purchaser or the Company under or by virtue of
                           the Warranties:
                                    (i)      to the extent that allowance,
                                    provision or reserve in respect of the
                                    matter or thing which gave rise to any such
                                    liability has been provided for in the
                                    Accounts or to the extent that payment or
                                    discharge of the relevant matter has been
                                    taken into account therein; or
                                    (ii)     in respect of any allowance,
                                    provision or reserve made in the Accounts
                                    which is insufficient or inadequate only by
                                    reason of any increase in any rate of
                                    Taxation effective after the Accounts Date;
                                    or
                                      -14-
   17
                                    (iii)    to the extent that such liability
                                    would not have arisen or would have been
                                    made for a lesser amount but for any
                                    alteration, enactment or re-enactment of any
                                    legislation, subordinate legislation or
                                    quasi legislative act or any regulatory
                                    requirement or any SSAP or FRS which takes
                                    effect after Completion;
                           (l)      nothing contained in this agreement shall or
                           shall be taken to relieve the Purchaser or the
                           Company of any duty and obligation to use reasonable
                           endeavours to (which shall not include making a claim
                           against the Purchaser's insurer but shall include
                           making a claim against the Company's insurer(s) as at
                           Completion where permitted under the relevant
                           insurance policy) mitigate any Damages which the
                           Purchaser or the Company may incur or suffer and the
                           Purchaser shall and shall procure that the Company
                           shall use reasonable endeavours (which shall not
                           include making a claim against the Purchaser's
                           insurer but shall include making a claim against the
                           Company's insurer(s) as at Completion where permitted
                           under the relevant insurance policy) to mitigate any
                           such Damages which the Purchaser or the Company may
                           incur or suffer in relation to any claim against the
                           Warrantors under or pursuant to the Warranties
                           subject to the Purchaser and/or the Company being
                           indemnified by the Warrantors against all costs and
                           expenses reasonably and properly incurred in
                           connection therewith;
                           (m)      if the benefit of the Warranties or indeed
                           any other right of the Purchaser or the Company under
                           this agreement is assigned, the obligations and
                           liabilities of the Warrantors (if any) shall be no
                           greater than it would have been if the Purchaser had
                           remained the owner of the Sale Shares and had
                           retained the benefit of the Warranties and its other
                           rights under or pursuant to this agreement;
                                      -15-
   18
                           (n)      the Purchaser irrevocably and
                           unconditionally waives any and all rights it may have
                           to rescind this agreement for any breach of the
                           Warranties or untrue representation, or undertaking
                           or statement of fact or opinion made to it in
                           relation to the subject matter or this agreement or
                           the Company which is not contained in this agreement
                           or the Warrantors' Disclosure Letter (including the
                           annexures thereto) and, save in the case of any
                           fraudulent misrepresentation, the Purchaser agrees
                           with the Warrantors that the Purchaser shall have no
                           remedy against the Warrantors, and the Warrantors
                           shall have no liability of whatever nature and
                           howsoever arising to the Purchaser, in respect of any
                           statement of fact or opinion whatsoever, including
                           any untrue or misleading statement, warranty or
                           representation (express or implied) made to the
                           Purchaser or its agents, officers or employees upon
                           which the Purchaser or its agents, officers or
                           employees relied or may have relied in entering into
                           this agreement which is not contained in this
                           agreement;
                           (o)      for the purpose of enabling the Warrantors
                           to remedy a breach or to mitigate or otherwise
                           determine the amount of any claim for breach of the
                           Warranties or to decide what steps or proceedings
                           should be taken in order to mitigate any claim for
                           breach of the Warranties, the Purchaser shall:
                                    (i)      give notice to the Warrantors
                                    within 14 days of any breach or
                                    circumstances giving or likely to give rise
                                    to a breach coming to its notice or to the
                                    notice of any company;
                                    (ii)     pass to the Warrantors as soon as
                                    reasonably possible, any further particulars
                                    it receives relating to the breach or
                                    circumstances referred to in paragraph (i)
                                    above;
                                    (iii)    make or procure to be made
                                    available to the Warrantors or their duly
                                    authorised representatives all relevant
                                    books of accounts, records and
                                    correspondence of the Company and permit the
                                    Warrantors to ascertain or extract any
                                    relevant information therefrom;
                                    (iv)     at the request of the Warrantors,
                                    allow the Warrantors to participate in the
                                    sole conduct of any claim against the
                                    Purchaser or the Company which has given
                                    rise to a claim for breach of the Warranties
                                    against the Warrantors under this agreement;
                                    and
                                      -16-
   19
                                    (v)      make no admission of liability,
                                    agreement, settlement or compromise in
                                    respect of any claim with any third party
                                    (including, for the avoidance of doubt, any
                                    insurance company) without the prior written
                                    approval of the Warrantors, which approval
                                    shall not unreasonably be withheld;
                           (p)      upon any claim being made, the Purchaser
                           shall and shall co-operate to procure that the
                           Company shall, make available to accountants and
                           others appointed by the Warrantors such relevant
                           records and information as the Warrantors reasonably
                           request in connection with such claim and the
                           Purchaser shall, and shall co-operate to procure that
                           the Company shall, use best endeavours to procure
                           that the auditors (both past and then current) of the
                           Company makes available to the Warrantors and to
                           accountants and others appointed by the Warrantors
                           their audit working papers in respect of audit of the
                           Company's accounts for any relevant accounting period
                           in connection with the claim. Such access shall be
                           required only at reasonable times and on reasonable
                           notice;
                           (q)      the liability of the Warrantors under or in
                           connection with the Warranties shall be several and
                           not, for the avoidance of doubt, joint and several;
                           (r)      notwithstanding any other provision of this
                           agreement (including, for the avoidance of doubt, the
                           Warranties), the Purchaser acknowledges to and agrees
                           with the Warrantors that no warranty, covenant,
                           representation, indemnity or undertaking (whether
                           express or implied) shall be deemed to be made nor
                           shall the Warrantors have any liability in respect of
                           any Warranty or any other provision of this agreement
                           in so far as it relates to the Company's IPR or any
                           person's or persons' Intellectual Property including,
                           for the avoidance of doubt, in relation to either the
                           Company's interest or interests in or title to titles
                           in and to the Company's IPR save to the extent
                           expressly set out in Warranties 12.1 to 12.19 set out
                           in Part B of schedule 4 respectively ("the IPR
                           Warranties");
                                      -17-
   20
                           (s)      the maximum aggregate liability of the
                           Warrantors under or by virtue of this agreement
                           (including the Warranties) shall not exceed the
                           aggregate value of the Escrow Fund at the date of
                           payment of any such liability. Accordingly, the
                           maximum aggregate liability of each of the Warrantors
                           under this agreement (including the Warranties) shall
                           not exceed the value of the Escrow Shares set against
                           the name of the respective Warrantor in column 4.2 of
                           schedule 1 as at the date of payment of any such
                           liability. Any and all amounts to be paid by the
                           Warrantors for their share of any liability under
                           this agreement (including the Warranties) shall be
                           payable only out of the Escrow Fund (to the extent
                           then available).
                           (t)      all liability of the Warrantors under or by
                           virtue of the Warranties shall cease and any claim
                           made thereunder or by virtue thereof against the
                           Warrantors shall be wholly barred and unenforceable:-
                  (i)      in the case of liability under or by virtue of the
                           Warranties (other than the IPR Warranties), with
                           effect from 3 May 2000; and
                  (ii)     in the case of liability under or by virtue of the
                           IPR Warranties, with effect from 3 November 1999.
                  unless notice of the relevant claims specifying the amount
                  claimed and with (i) reasonable details of the facts and
                  circumstances, in so far as then available, constituting or
                  giving rise to the alleged breach or the alleged liability and
                  (ii) the amount claimed in respect thereof (detailing (in so
                  far as possible) the amount of Damages suffered by the
                  Purchaser or the Company and the basis and method of
                  calculation of such Damages) shall have been given to the
                  Warrantors prior to the dates referred to in paragraphs (i)
                  and (ii) above. Any such claim under or by virtue of the
                  Warranties (other than the IPR Warranties) shall (if it has
                  not been previously satisfied, settled or withdrawn) be deemed
                  to have been withdrawn after 3 November 2000 unless
                  proceedings (whether by way of litigation, arbitration or
                  otherwise) in respect of it have commenced by being served on
                  the Warrantors prior to 3 November 2000. Any such claim under
                  or by virtue of the IPR Warranties shall (if it has not been
                  previously satisfied, settled or withdrawn) be deemed to have
                  been withdrawn on 3 May 2000 unless proceedings (whether by
                  way of litigation, arbitration or otherwise) in respect of it
                  have been commenced by being served on the Warrantors prior to
                  3 May 2000. Following the commencement of any claim under the
                  Warranties the Purchaser undertakes to proceed with such claim
                  or claims as quickly as reasonably possible (having regard to
                  all relevant circumstances).
                                      -18-
   21
                  5.3      Subject to this clause 5, all claims shall be made in
                  accordance with the provisions of the Escrow Agreement.
         6.       PURCHASER'S WARRANTIES
                  6.1      The Purchaser represents and warrants in the
                  knowledge that the Vendors are entering into this agreement in
                  reliance upon the accuracy of each of the Purchaser's
                  Warranties that the Purchaser's Warranties are true and
                  accurate.
                  6.2      Each of the Purchaser's Warranties shall be construed
                  as a separate and independent warranty and shall not be
                  governed, limited or restricted by reference to or inference
                  from any other terms of this agreement or any other
                  Purchaser's Warranty.
                  6.3      The rights and remedies of the Vendors in respect of
                  any breach of this agreement shall not be affected by any
                  investigation made by or on behalf of the Vendors into the
                  affairs of the Purchaser or actual or constructive knowledge
                  on the part of the Vendor or their agents or advisers or by
                  any other event or matter whatsoever, except a specific and
                  written waiver or release given by the Vendor and except as
                  otherwise expressly provided in this agreement in relation to
                  the Purchaser's Disclosure Letter.
                  6.4      If there is a breach of any of the Purchaser's
                  Warranties then, in respect of each such breach, the Vendors
                  shall be entitled to claim Damages from the Purchaser on any
                  basis which may be available to them.
         7.       COMPLETION
                  7.1      Subject to the provisions of schedule 5, the sale and
                  purchase of the Sale Shares shall be completed at the offices
                  of the Purchaser's Solicitors at 9.00 a.m. on 3 May 1999 (or
                  at such other time or place as the parties shall agree).
                  7.2      On Completion 3i shall deliver to the Purchaser a
                  duly executed stock transfer forms in respect of its Sale
                  Shares together with the related share certificates (such
                  stock transfer forms to be in favour of the Purchaser or its
                  nominees, as the Purchaser shall direct) to enable it or its
                  nominees to be registered as the holders of the Sale Shares
                  free from all encumbrances.
                  7.3      On Completion the Warrantors shall deliver or cause
                  to be delivered to the Purchaser:
                           (a)      duly executed stock transfer forms in
                           respect of the Sale Shares together with the related
                           share certificates (such stock transfer forms to be
                           in favour of the Purchaser or its nominees, as the
                           Purchaser shall direct) to 
                                      -19-
   22
                           enable it or its nominees to be registered as the
                           holders of the Sale Shares free from all
                           Encumbrances;
                           (b)      an acknowledgement from each of the
                           Warrantors to the Purchaser and the Company executed
                           as a deed to the effect that save in relation to
                           remuneration or reimbursement of expenses incurred in
                           relation to his or her employment details of which
                           are specified in such deed, there is no outstanding
                           indebtedness owing at Completion from the Company to
                           such Warrantor or to any such Warrantor's Affiliate
                           or vice versa;
                           (c)      letters of resignation in the agreed form
                           from ▇▇▇ ▇▇▇▇, ▇▇▇▇ ▇▇▇▇▇, ▇▇▇ ▇▇▇▇▇, ▇▇▇▇▇▇▇
                           ▇▇▇▇▇▇▇▇ and ▇▇▇ ▇▇▇▇▇▇ as directors of the Company;
                           (d)      written confirmation to the Company and the
                           Purchaser that each of the aforementioned departing
                           directors of the Company (other than ▇▇▇ ▇▇▇▇▇ and
                           ▇▇▇ ▇▇▇▇▇▇) has returned or delivered to the Company
                           all property of the Company used, enjoyed or held by
                           them in their capacity as employees or officers of
                           the Company including without prejudice to the
                           generality of the foregoing books, records, papers
                           and information of the Company (on whatever medium
                           stored), motor vehicles, credit cards, keys, security
                           cards, personal computers, software, magnetic or
                           other discs on which information is stored;
                           (e)      the written resignation of the auditors of
                           the Company together with a statement in accordance
                           with section 394 of the Companies Act that there are
                           no circumstances connected with such resignation
                           which they consider should be brought to the
                           attention of the members or creditors of the Company;
                           (f)      the statutory books of the Company complete
                           and accurate up to Completion (but not including any
                           acts or transactions to take place at Completion) and
                           any company seal(s), certificates of incorporation,
                           certificates of incorporation on change of name and
                           all unused share certificates of the Company and all
                           cheque books of the Company;
                           (g)      the Warrantors' Disclosure Letter;
                           (h)      revised contracts in the agreed form between
                           the Purchaser and each of Simon Best and Piers
                           Lincoln duly executed by the parties.
                           (i)      consultancy agreements in the agreed form
                           between the Purchaser and each of ▇▇▇▇ ▇▇▇▇▇ and ▇▇▇
                           ▇▇▇▇▇▇ duly executed by the parties.
                                      -20-
   23
                  7.3      On Completion the Warrantors shall procure the
                  holding of a meeting of the directors of the Company at which
                  the directors of the Company shall:
                           (a)      (subject to stamping) approve the transfers
                           to the Purchaser (or its nominees) of the Sale
                           Shares;
                           (b)      appoint ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ and ▇▇▇ ▇▇▇▇▇▇ as
                           additional directors of the Company;
                           (c)      accept the resignations referred to in
                           sub-clauses 7.2(c) and (e) relating to the Company;
                           (d)      appoint Ernst & Young as the new auditors of
                           the Company;
                           (e)      change the accounting reference date of the
                           Company to 31 December; and
                           (f)      cancel the existing mandates to the
                           Company's bankers and replace them with new mandates
                           as requested by the Purchaser.
                  7.4      On Completion the Vendors shall pass a written
                  resolution changing the name of the Company to Geron Bio-Med
                  Limited.
                  7.5      On Completion the Purchaser shall deliver to the
                  Vendors or to the Company's Solicitors for and on behalf of
                  the Warrantors (whose receipt shall be a sufficient
                  discharge):
                           (a)      a certified copy of the minutes of the board
                           of directors of the Purchaser authorising the
                           execution and performance by the Purchaser of its
                           obligations under this agreement;
                           (b)      the Purchaser's Disclosure Letter;
                           (c)      a certified copy of instructions to the
                           Purchaser's Transfer Agent to prepare Share Stock
                           Certificates in favour of the Vendors in respect of
                           the number of Consideration Shares set out against
                           their respective names in column 4 of schedule 1.
                  7.6      On or prior to Completion each of the following shall
                  be done:
                           (a)      the Purchaser and Roslin Institute shall
                           enter into or have entered into the Research
                           Agreement;
                                      -21-
   24
                           (b)      the Purchaser, the Company and Roslin
                           Institute shall enter into or have entered into the
                           Licence Agreement;
                           (c)      the Purchaser, and the Warrantors'
                           Representative shall and shall ensure that the Escrow
                           Agent shall have entered into the Escrow Agreement;
                           (d)      the Purchaser and each of the Vendors' shall
                           enter into or have entered into the Registration
                           Rights Agreement.
                  7.7      On or as soon as practicable after Completion, the
                  Consideration Shares which each Warrantor is entitled to
                  receive pursuant to clause 3 of this agreement (namely, in
                  aggregate 860,000 Consideration Shares) shall without any act
                  of such Warrantor be registered in the name of the Warrantor
                  and shall be deposited with the Escrow Agent and such deposit
                  or deposits shall constitute the Escrow Fund.
        8.        COVENANTS OF THE PURCHASER AND THE VENDORS
                  8.1      Each party shall execute and do all such lawful
                  documents acts and things as may be reasonably required
                  subsequent to Completion by the other parties for, in the case
                  of the Purchaser, securing to or vesting in the Purchaser the
                  legal and beneficial ownership of such party's Sale Shares and
                  in the case of the Vendors, the legal and beneficial ownership
                  of the relevant Consideration Shares (subject always to the
                  other provisions of this Agreement, the Escrow Agreement and
                  the Registration Rights Agreement).
                  8.2      All parties to this agreement agree that the
                  Purchaser and the Vendors will be jointly responsible for any
                  press release or publication with respect to the existence of
                  this agreement or the transactions contemplated hereby and
                  further agree to co-operate in good faith with respect to any
                  such press release or public statement and except as may be
                  required by law or by any regulatory authority to which the
                  parties are subject, further agree not to issue any such press
                  release or public statement without the prior written consent
                  of the Purchaser, 3i and the Warrantors' Representative (as
                  appropriate) (in the case of a publication proposed by the
                  Company and/or a Vendor). Each party agrees to provide any
                  such press release or public statement to the Company, 3i and
                  the Warrantors' Representative in advance of publication and
                  provide the Company, 3i and the Warrantors' Representative a
                  reasonable opportunity to review and comment on such
                  publication.
                  8.3      Each party will fully co-operate (in so far as it is
                  lawfully able so to do) with the other parties, their lawyers
                  and accountants in connection with any steps required to be
                  taken as part of its obligations under this agreement.
                                      -22-
   25
                  8.4      The Purchaser reserves the right to make an election
                  under Section 338(g) of the US Internal Revenue Code and any
                  comparable provisions of state, local or foreign law. The
                  Vendors acknowledge that the Purchaser shall control the
                  preparation and filing of such election and the Vendors agree
                  that they will reasonably co-operate with the Purchaser and
                  the Company with respect thereto.
                  8.5      All stamp duties or stamp duty reserve tax payable on
                  the transfer of the Sale Shares to the Purchaser or otherwise
                  arising from the transactions contemplated by this agreement
                  shall be borne by the Purchaser.
                  8.6      The Warrantors shall procure that the Company's
                  Accountants shall prepare the tax returns and computations of
                  the Company for the accounting period ending on or prior to 28
                  February 1999, save that the preparation and submission of the
                  same shall not be unreasonably delayed. Should the preparation
                  or submission of the tax returns and computations of the
                  Company for the accounting period ending on or prior to the 28
                  February 1999 in the reasonable opinion of the Purchaser be
                  unreasonably delayed by the Warrantors, then the Purchaser
                  shall prepare and submit the same.
                  8.7      The Purchaser shall procure that the returns and
                  computations mentioned in clause 8.6 shall be authorised,
                  signed and submitted to the appropriate Tax Authority without
                  amendment or with such amendments required by the Purchaser
                  and which the Warrantors shall reasonably agree and the
                  Purchaser shall give the Warrantors or their agents all such
                  assistance as may be reasonably required to prepare those
                  returns and computations for submission to the appropriate
                  Taxation Authorities provided that the Purchaser shall not be
                  obliged to take any such action as is mentioned in this clause
                  8.7 in relation to any return that is not full, true and
                  accurate in all material respects. Nor shall the Purchaser be
                  obliged to take any such action which in the reasonable
                  opinion of the Purchaser shall affect adversely either the
                  future tax liability of either the Purchaser or the Company
                  concerned or of any person connected with any of them, or in
                  any way materially prejudice the relationship of the Purchaser
                  or the Company with any Taxation Authority.
        9.        RESTRICTIONS
                  9.1      By way of further consideration of the Purchaser
                  agreeing to purchase the Sale Shares from the Vendors, each of
                  the Warrantors covenants with the Purchaser that he or it will
                  not whether alone or jointly with or as agent of any person or
                  persons directly or indirectly:
                           (a)      for the period of two years after the
                           Relevant Date:
                                    (i)      take up or hold any office in or
                                    with any business or undertaking; or
                                      -23-
   26
                                    (ii)     take up or hold any post or
                                    position which enables or permits that
                                    Warrantor to exercise a controlling
                                    influence over any business or undertaking;
                                    or
                                    (iii)    take up or hold any employment or
                                    consultancy with any person which is engaged
                                    in any business or undertaking
                  which results in that Warrantor being engaged in a Restricted
                  Activity, provided that the Warrantor shall not be precluded
                  from:-
                  (aa)     in the case of the Warrantors (other than Roslin
                           Institute), complying with their obligations under
                           any contract of employment or consultancy agreement
                           with the Company or the Purchaser or being employed
                           or otherwise engaged in any such business or
                           undertaking whose activities include any business
                           which competes with the Company so long as that
                           Warrantor will not be directly or indirectly employed
                           or engaged in, or review materials produced by or
                           relating to that business or undertaking;
                  (bb)     in the case of Roslin Institute:-
                           (A)      receiving commercial funding of research in
                                    the Restricted Field subject to the prior
                                    written consent of the Purchaser;
                           (B)      receiving non-commercial funding of research
                                    in the Restricted Field provided that the
                                    Purchaser shall, prior to any intellectual
                                    property arising from such research being
                                    made available to any third party for
                                    commercial exploitation, have an exclusive
                                    option exercisable within 45 days following
                                    receipt of written notice from the Roslin
                                    Institute to take an exclusive worldwide
                                    licence to such intellectual property and if
                                    it elects not to do so (for whatever reason)
                                    or the terms of such licence cannot be
                                    agreed within such period then such
                                    intellectual property may be offered to
                                    third parties on terms no more favourable
                                    than the terms upon which it was offered to
                                    the Purchaser;
                           (cc)     holding as an investment not more than 5% of
                           the issued share capital of a company quoted on a
                           recognised stock exchange (as that expression is
                           defined in section 207 Financial Services Act 1986);
                           (b)      for the period of two years after the
                           Relevant Date deal with any person who at any time
                           during the period of twelve months prior to the
                           Relevant Date is or was a collaborator or customer of
                           the Company in connection with any research,
                           development, products or services in competition with
                           the Restricted Activity provided that that each
                           Warrantor shall not be precluded from dealing with a
                           company whose
                                      -24-
   27
                           activities compete with the Company so long as that
                           Warrantor does not either directly or indirectly deal
                           in any such research, development, products or
                           services which so compete;
                           (c)      for the period of two years after the
                           Relevant Date canvass, solicit, approach or seek out
                           or cause to be canvassed, solicited, approached or
                           sought out or by any other means endeavour to entice
                           away from the Company any customer, orders,
                           instructions or other material in respect of any
                           products or services provided to or supplied by the
                           Company provided the Warrantor has transacted with
                           such person as a customer or as a supplier;
                           (d)      for the period of two years after the
                           Relevant Date canvass, solicit, approach, seek out,
                           or cause to be canvassed, solicited, approached or
                           sought out or by any other means endeavour to entice
                           away from the Company, or employ or aid or assist any
                           other person or persons in employing or otherwise
                           retaining the services of anyone who is employed by
                           the Company or who is a consultant to or who is a
                           collaborator with the Company at the Relevant Date
                           but shall not include any person employed in a junior
                           administrative or secretarial capacity;
                           (e)      after the Relevant Date either represent
                           himself or itself or hold himself or itself out to be
                           in any way connected with or interested in the
                           business of the Company.
                  9.2      The Warrantors hereby acknowledge and declare that
                  the restrictions in sub-clause 9.1 are reasonable in all the
                  circumstances as at the Completion Date; that such
                  restrictions are integral to the terms on which the Purchaser
                  has agreed to purchase the Sale Shares and that each of such
                  restrictions shall be construed and take effect independently
                  of the others.
                  9.3      If any breach or violation of the provisions of
                  sub-clause 9.1 occurs, the Warrantors and the Purchaser agree
                  that damages alone are likely not to be sufficient
                  compensation and that injunctive relief is reasonable and is
                  likely to be essential to safeguard the interests of the
                  Purchaser and of the Company and that injunctive relief (in
                  addition to any other remedies afforded by a court of equity)
                  may (subject to the discretion of the courts) be obtained. No
                  waiver of any such breach or violation of the provisions of
                  sub-clause 9.1 shall be implied from forbearance or failure by
                  the Purchaser to take action
                                      -25-
   28
         10.      CONFIDENTIALITY
                  10.1     Each Vendor acknowledges to the Purchaser that he or
                  it has been exposed to information about the Company which is
                  either a trade secret, confidential or commercially sensitive
                  and which may not be readily available to others engaged in a
                  similar business to that of the Company or to the general
                  public and which if disclosed may cause harm to the Company or
                  the Purchaser.
                  10.2     Subject to sub-clauses 10.3 and 10.4, each Vendor
                  undertakes to the Purchaser severally that he or it shall keep
                  secret and shall not at any time, for whatever reason, use,
                  communicate or reveal to any person for that Vendor's own or
                  another's benefit, any Confidential Information which shall
                  have come to his or its knowledge prior to Completion (except
                  in this context "use" shall not be construed to apply to the
                  use of such information in making and monitoring investments
                  by a Vendor in the ordinary course of business). Each Vendor
                  shall as soon as reasonably practicable inform the Purchaser
                  of any disclosure or use of any such information of which he
                  or it becomes actually aware knowing it to be Confidential
                  Information.
                  10.3     The restrictions contained in sub-clause 10.2 shall
                  not apply to:
                           (a)      any disclosure authorised in writing by an
                           officer of the Purchaser or required in the ordinary
                           and proper course of the particular Vendor's service
                           agreement or consultancy agreement with the Purchaser
                           or the Company or in or as required by the order of a
                           court of competent jurisdiction or an appropriate
                           regulatory authority or Government Entity; or
                           (b)      any information which was known to the
                           particular Vendor concerned prior to the commencement
                           of his employment or engagement by the Company or is
                           in or comes into the public domain otherwise than as
                           a result of a breach by such Vendor of this clause
                           10.
                  10.4     Except:
                           (a)      as may be required by law or in the case of
                           the Purchaser or 3i the regulations of any recognised
                           investment exchange or recognised stock exchange (as
                           defined in the Financial Services ▇▇▇ ▇▇▇▇ and the
                           Companies Act respectively) or required by any
                           regulatory authority to which the parties are
                           subject; or
                           (b)      as may be required in relation to any
                           registration of this agreement or any arrangement of
                           which it forms part under the Restrictive Trade
                           Practices ▇▇▇ ▇▇▇▇; or
                                      -26-
   29
                           (c)      as may be required to vest the full benefit
                           of this agreement or any other agreements or
                           documents entered into and as contemplated hereby
                           (including, for the avoidance of doubt, enforcement
                           thereof) in the Purchaser and the Vendors
                           respectively;
         the provisions of this agreement and all negotiations relating to this
         agreement are strictly confidential and no announcement or disclosure
         of or publicity relating to the sale and purchase hereunder and terms
         of this agreement shall be made by the parties to any third party
         (other than their professional advisers and bankers) without the
         written agreement of the other parties save where expressly provided
         otherwise in this agreement.
         11.      RESTRICTIVE TRADE PRACTICES ACT
         Unless this agreement or any agreement or arrangement of which this
         agreement forms part is a non-notifiable agreement for the purposes of
         section 27A of the Restrictive Trade Practices ▇▇▇ ▇▇▇▇, if there is a
         provision of this agreement, or of any such agreement or arrangement,
         which causes or would cause this agreement or any such agreement or
         arrangement to be subject to registration under the Restrictive Trade
         Practices ▇▇▇ ▇▇▇▇, that provision shall not take effect until the day
         after the day upon which particulars of this agreement (or of that
         agreement or arrangement, as the case may be) have been furnished to
         the Director General of Fair Trading pursuant to section 24 of the
         Restrictive Trade Practices Act 1976 and if the agreement (or any other
         such agreement or arrangement) is subject to registration under the
         Restrictive Trade Practices Act 1976 the parties shall co-operate in
         good faith and at the sole cost and expense of the Purchaser in order
         to carry out such registration as soon as reasonably practicable
         following the date of this agreement and in any event within three
         months of the date of this agreement.
         12.      NOTICES
                  12.1     Any notice or other written communication given under
                  or in connection with this agreement may be delivered
                  personally or sent by prepaid recorded delivery or registered
                  post or by facsimile to the address or number and for the
                  attention of the relevant party set out in sub-clause 12.2 (or
                  such other address or number as is otherwise notified from
                  time to time).
                  12.2     The addresses of the parties for the purpose of
                  sub-clause 12.1 are as follows:
         The Purchaser:           ▇▇▇▇▇ ▇ ▇▇▇▇▇▇▇▇▇
                                  Geron Corporation
                                  ▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇
                                  ▇▇▇▇▇ ▇▇▇▇, ▇▇ 1985 94025
                                  USA
                                      -27-
   30
                                  Attention: Vice President of Corporate 
                                             Development and Chief Financial 
                                             Officer
                                  Facsimile No:     (▇▇▇) ▇▇▇ ▇▇▇▇
                                  Telephone No:     (▇▇▇) ▇▇▇ ▇▇▇▇
                                  With copy to:
                                  ▇▇▇▇▇▇ ▇ ▇▇▇▇▇
                                  Venture Law Group
                                  ▇▇▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇
                                  ▇▇▇▇▇ ▇▇▇▇, ▇▇ 1985 94025
                                  Facsimile No:     (▇▇▇) ▇▇▇-▇▇▇▇
                                  Telephone No:     (▇▇▇) ▇▇▇-▇▇▇▇
                                  and to:
                                  ▇▇▇▇▇ ▇▇▇▇▇▇
                                  ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇
                                  ▇▇▇▇▇▇▇▇▇
                                  ▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇
                                  ▇▇▇▇▇▇▇▇▇▇▇
                                  ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇
                                  Facsimile No:     44171 936-2666
                                  Telephone No:     ▇▇▇▇▇ ▇▇▇-▇▇▇▇
         The Vendors:             ▇▇▇▇▇▇▇▇ ▇▇▇▇
                                  (on behalf of the Warrantors
                                  Dundas & ▇▇▇▇▇▇)
                                  ▇▇▇ ▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇
                                  ▇▇▇▇▇▇▇
                                  ▇▇ ▇▇▇
                                  Facsimile No:  0141 222 2201
                                  Telephone No: ▇▇▇▇ ▇▇▇ ▇▇▇▇
                                  ▇▇▇ ▇▇▇▇▇▇▇▇▇ (on behalf of Roslin
                                  Institute) 
                                  ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ 
                                  ▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ 
                                  ▇▇▇▇▇▇▇ ▇▇ ▇▇▇
                                      -28-
   31
                                  Facsimile No:   0141 248 2326
                                  Telephone No:  ▇▇▇▇ ▇▇▇ ▇▇▇▇
                                  c/o Local Director
                                  3i plc
                                  ▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇
                                  ▇▇▇▇▇▇▇  ▇▇ ▇▇▇
                                  Facsimile No:   0141 248 3245
                                  Telephone No:   ▇▇▇▇ ▇▇▇ ▇▇▇▇
                  12.3     Any such notice or other written communication shall
                  be deemed to have been served:
                           (a)      if delivered personally, at the time of
                           delivery;
                           (b)      if posted, at the expiry of two Business
                           Days after it was posted or 10 Business Days where it
                           was sent by airmail;
                           (c)      if sent by facsimile message, at the time of
                           transmission (if sent during Business Hours) or (if
                           not sent during Business Hours) at the beginning of
                           Business Hours next following the time of
                           transmission in the place to which the facsimile was
                           sent.
                  12.4     In proving such service it shall be sufficient to
                  prove that personal delivery was made, or that such notice or
                  other written communication was properly addressed stamped and
                  posted or in the case of a facsimile message that an activity
                  or other report from the sender's facsimile machine can be
                  produced in respect of the notice or other written
                  communication showing the recipient's facsimile number and the
                  number of pages transmitted.
                  12.5     Any notice to be served upon the Vendors must be
                  given to each of them.
                                      -29-
   32
         13.      MISCELLANEOUS
                  13.1     The Purchaser shall be responsible for its own and
                  the advisory, legal and accounting fees and expenses of the
                  Company and its advisers related to the negotiation,
                  preparation, finalisation and completion of this agreement and
                  all other documentation contemplated thereby. Save as
                  aforesaid each party shall indemnify and hold harmless the
                  other party from any claims for broker's or finder's fees
                  arising from this transaction by any person claiming to have
                  been engaged by such party.
                  13.2     Subject to clause 5, this agreement shall so far as
                  it remains to be performed after execution continue in full
                  force and effect notwithstanding Completion.
                  13.3     No term or provision of this agreement shall be
                  varied or modified by any prior or subsequent statement,
                  conduct or act of any party, except that the parties may amend
                  or vary this agreement but only by letter or written
                  instrument signed by all of the parties.
                  13.4     Subject to the other provisions of this agreement, no
                  waiver by any of the parties to this agreement of any
                  requirements of this agreement or of any of such party's
                  rights under this agreement shall be valid unless such waiver
                  is in writing and signed by or on behalf of each of the
                  parties to this agreement.
                  13.5     Subject to the other provisions of this agreement, no
                  failure to exercise, and no delay in exercising, on the part
                  of the Purchaser any right or remedy under this agreement
                  shall operate as a waiver of such right or remedy nor shall
                  any single or partial exercise of any right or remedy preclude
                  the exercise of any other right or remedy.
                  13.6     Subject to the other provisions of this agreement,
                  the rights and remedies conferred on the Purchaser in this
                  agreement are cumulative.
                  13.7     The headings to the clauses in this agreement and in
                  the schedules are for ease of reference only and shall not
                  form any part of this agreement for the purposes of
                  construction.
                  13.8     This agreement and the documents to be delivered on
                  Completion as set out in clause 7:
                           (a)      set out the entire agreement and
                           understanding between the parties in respect of the
                           sale and purchase of the Sale Shares; and
                           (b)      (in relation to such subject matter)
                           supersede all prior discussions, understandings,
                           undertakings, promises, conditions, indemnities,
                           warranties, representations, covenants, undertakings
                           and agreements between the parties and their agents
                           (or any of them) and all prior 
                                      -30-
   33
                           representations, warranties and expressions of
                           opinion by any party (or its agent) to any other
                           party (or its agent).
                  13.9     It is acknowledged and agreed that:
                           (a)      no party has entered into this agreement in
                           reliance upon any representation, warranty, promise,
                           condition, representation, covenant, indemnity or
                           undertaking of any other party which is not expressly
                           set out in this agreement;
                           (b)      no party shall have any claim or remedy in
                           respect of misrepresentation or breach of warranty
                           (whether negligent or otherwise) or any untrue
                           statement made by any other party save to the extent
                           set out in or expressly incorporated in this
                           agreement and each party irrevocably and
                           unconditionally waives any right which it may have to
                           claim damages for any misrepresentation (other than a
                           misrepresentation contained in this agreement) or for
                           breach of any express or implied warranties (other
                           than a warranty set out in or expressly incorporated
                           in this agreement).
                  13.10    This agreement may be entered into in any number of
                  counterparts and by the parties to it on separate
                  counterparts, each of which when so executed and delivered
                  shall be an original, but all the counterparts shall together
                  constitute one and the same instrument.
                  13.11    If at any time any term or provision in this
                  agreement shall be held to be illegal, invalid or
                  unenforceable, in whole or in part, under any rule of law or
                  enactment, such term or provision or part shall to that extent
                  be deemed not to form part of this agreement, but the
                  enforceability of the remainder of this agreement shall not be
                  affected.
                  13.12    Any notice, consent or agreement or other action to
                  be required to be taken by any of the Vendors pursuant to or
                  in connection with this agreement may only be given by each of
                  the Vendor on its own behalf.
                  13.14    This agreement shall be binding on and shall enure
                  for the benefit of the personal representatives and successors
                  of the parties.
         14.      WARRANTORS' REPRESENTATIVE
                  The following provisions of this clause 14 (other than clause
                  14.6) shall apply amongst the Warrantors alone to the
                  exclusion of the Purchaser (other than clause 14.6) and 3i:-
                  14.1     A committee comprising the Warrantors' Representative
                  shall be formed and shall at all times be comprised of not
                  more 2 members ("Committee"). Any member of the 
                                      -31-
   34
                  Committee (each a "Member") may resign at any time by giving
                  30 days written notice thereof to the other Member. A Member
                  must be a Warrantor or the duly authorised representative of a
                  Warrantor. Any Member may be removed at any time by the
                  affirmative vote or written consent of Warrantors being
                  interested at least 75% of the Escrow Shares. If any Member
                  shall resign, be removed or become incapable of acting, or if
                  a vacancy in the membership of the Committee shall otherwise
                  occur, the holders of 75% of the Escrow Shares may appoint
                  another person to act as a member of the Committee. Such
                  successor Member (if not a Warrantor) shall execute a deed
                  agreeing to be bound by and adhere to the provisions of this
                  clause 15 and thereupon, without any further act, deed or
                  conveyance, shall become vested with all of the rights, power
                  and duties of the retiring Member. If both Members are
                  otherwise unable to act, or if the Warrantors elect to change
                  the Warrantors' Representative, then the Warrantors may
                  appoint a new Committee or another agent or body to act as
                  Warrantors' Representative by the affirmative vote or written
                  consent of Warrantors holding not less than 75% of the Escrow
                  Shares. No bond shall be required of the Warrantors'
                  Representative, and neither Member shall receive compensation
                  for his, her or its services. Notices or communications to or
                  from the Warrantors' Representative shall constitute notice to
                  or from each of the Warrantors. The Warrantors' Representative
                  shall be entitled to submit a claim and receive reimbursement
                  from the Escrow Fund for all reasonable, documented
                  out-of-pocket expenses incurred by the Warrantors'
                  Representative as a result of acting as the Warrantors'
                  Representative; subject to the terms of the Escrow Agreement.
                  Any such reimbursement shall be paid in Escrow Shares out of
                  the relevant Escrow Fund.
                  14.2     ACTION BY THE COMMITTEE AND THE SHAREHOLDERS'
                  REPRESENTATIVE.
                  The Members may act only through the Committee. However, the
                  Members may individually implement actions approved by the
                  Committee. Meetings of the Committee shall be held at such
                  times as may from time to time be fixed by resolution of the
                  Committee or called by any Member of the Committee. Meetings
                  of the Committee shall be held at such place as from time to
                  time may be fixed by resolution of the Committee.
                  Notice of meetings of the Committee fixed by resolution of the
                  Committee need not be given. Notice of each other meetings
                  shall be mailed to each Member by the Member calling the
                  meeting, addressed to each Member's residence or usual place
                  of business, at least three days before the day on which the
                  meetings is to be held, or shall be sent to the Member by
                  telegraph, cable, wireless, or similar means so addressed or
                  shall be delivered personally, by telephone or by facsimile
                  with confirmation received, at least twenty-four (24) hours
                  before the time the meeting is to be held. Each notice shall
                  state the time and place of the meeting but need not state the
                  purposes thereof. Notices of any such meeting need not be
                  given to any Member who submits a signed waiver of notice,
                  whether before or after the meeting, or who attends the
                  meeting without protesting, prior thereto or at its
                  commencement, the lack of notice.
                  At each meeting of the Committee the presence of 2 Members
                  shall constitute a quorum for the transaction of business, and
                  the vote of 2 Members present at the time of the vote 
                                      -32-
   35
                  shall be the act of the Committee. In the event of deadlock,
                  the matter shall be referred as soon as reasonably practicable
                  to the Warrantors for resolution. The decision of Warrantors
                  holding at least 75% of the Escrow Shares shall be binding on
                  all of the Warrantors. Notwithstanding the foregoing, if there
                  is for any reason only one Member, such Member may act only
                  for the purpose of filling vacancies on the Committee or
                  making an objection to any claim made by the Purchaser against
                  the Escrow Shares in terms of the Escrow Agreement.
                  Any action required or permitted to be taken by the Committee
                  may be taken without a meeting if all Members consent in
                  writing to the adoption of a resolution authorizing the
                  action. The resolution and the written consents thereto by the
                  Members shall be filed with the minutes of the proceedings of
                  the Committee.
                  Any one or more Members may participate in a meeting of the
                  Committee by means of a conference telephone or similar
                  communications equipment allowing all person participating in
                  the meeting to hear each other at the same time. Participation
                  by such means shall constitute presence in person at a
                  meeting.
                  In performing its duties hereunder and as contemplated hereby
                  by the Purchase Agreement and Escrow Agreement, the Committee
                  may, but need not, confer and consult with any or all of the
                  Warrantors. All decisions made and actions taken by the
                  Warrantors' Representative in connection with this Agreement
                  and the Purchase Agreement shall be final and binding on the
                  Warrantors, whether or not the Committee consulted with the
                  Warrantors in the course of making any such decision or taking
                  any such action.
                  The Warrantors' Representatives shall be entitled to rely upon
                  any order, judgment, award, certification, demand, notice,
                  instrument or other writing delivered to it under this
                  Agreement or the Purchase Agreement without being required to
                  determine the authenticity or the correctness of any fact
                  stated therein or the propriety or validity of the service
                  thereof. The Warrantors' Representative may act in reliance
                  upon any instrument or signature believed by it to be genuine
                  and may assume that any persons purporting to give notice or
                  receipt of advice or make any statement or execute any
                  document in connection with the provisions hereof has been
                  duly authorized to do so.
                  The Warrantors' Representative may engage such third parties
                  at such cost as the Warrantors' Representative shall in its
                  sole discretion deem necessary or appropriate for the adequate
                  performance of its duties hereunder and may rely on the advice
                  of such third parties with respect to matters within their
                  professional or expert competence.
                  14.3     ACTION BY THE WARRANTORS' REPRESENTATIVE
                  Meetings of the Warrantors may be called at any time by the
                  holders of twenty-five percent (25%) of the Escrow Shares or
                  by the Committee and shall be held on such day and at such
                  hour as is fixed in the call of the meeting. If all Members of
                  the Committee 
                                      -33-
   36
                  have resigned or are otherwise unable to act, the holders of
                  ten percent (10%) of the Escrow Shares may call a meeting.
                  Meetings of the Warrantors shall be held at the Edinburgh
                  offices of the Company's Solicitors or at such other place, as
                  may be fixed by the Committee.
                  Notice of each meeting of Warrantors shall be in writing and
                  shall state the place, date, and hour of the meeting and shall
                  state the purpose or purposes for which the meeting is called
                  and who called the meeting. A copy of the notice of any
                  meeting shall be given by the Committee or the Warrantors
                  meeting, personally or by mail, not less than ten (10) nor
                  more than twenty (20) days before the date of the meeting, to
                  each Warrantor. If mailed, such notice is given when deposited
                  in the mail, with postage thereon prepaid, directed to the
                  Warrantor at such address as appears in schedule 1 to the
                  Purchase Agreement, or, if such Warrantor shall have filed
                  with the Committee a written request that notices be mailed to
                  some other address, then directed to the Warrantor at such
                  other address. Notice of meetings of Warrantors need not be
                  given to any Warrantor who submits a signed waiver of notice,
                  in person or by proxy, whether before or after the meeting.
                  The attendance of any Warrantor at a meeting, whether in
                  person or by proxy, without protesting prior to the conclusion
                  of the meeting the lack of notice of such meeting, shall
                  constitute a waiver of notice by him.
                  Every Warrantor may authorize another person or persons to act
                  for him by proxy. Every proxy shall be revocable at the
                  instance of the Warrantor executing it, except as otherwise
                  provided by law. The authority of the holder of a proxy to act
                  shall not be revoked by the incompetence or death of the
                  Warrantor who executed the proxy unless, before the authority
                  is exercised, written notice of an adjudication of such
                  incompetence or of such death is received by the Committee.
                  Proxies which contain a faxed signature shall be treated in
                  the same manner as proxies with original signatures.
                  Whenever Warrantors are required or permitted to take any
                  action by vote, such action may be taken without a meeting on
                  written consent, setting forth the action so taken, signed by
                  the holders of the holders of 75% of the Escrow Shares in
                  which they are interested to approve the action so taken.
                  14.4     Neither the Warrantors' Representative nor any Member
                  shall be liable for any act done or omitted hereunder as the
                  Warrantors' Representative or Member while acting in good
                  faith and in the exercise of reasonable judgment. The
                  Warrantors (other than any Warrantor who is a Member) shall
                  severally indemnify the Warrantors' Representative and each
                  Member and shall hold the Warrantors' Representative and each
                  Member harmless against any loss, liability or expense
                  incurred without gross negligence, bad faith or willful
                  misconduct on the part of the Warrantors' Representative or
                  such Member and arising out of or in connection with the
                  acceptance or administration of the Warrantors'
                  Representative's or such Member's duties hereunder, including
                  the reasonable fees and expenses of any legal counsel retained
                  by the Warrantors' Representative or such Member.
                                      -34-
   37
                  14.5     Neither the Warrantors' Representative nor any Member
                  shall be liable for any mistake of fact or of law or any error
                  of judgement. Each Member and the Warrantors' Representative
                  is authorised to comply with and obey laws, orders,
                  judgements, decrees, and regulations of any governmental
                  authority, court, tribunal or arbitrator. If the Warrantors'
                  Representative or any Member complies with any such law,
                  order, judgement, decree or regulation, such Warrantors'
                  Representative or Member shall not be liable to the Warrantors
                  or to any other person even if such law, order, judgement,
                  decree or regulation is subsequently reversed modified,
                  annulled, set aside, vacated, found to have been entered
                  without jurisdiction or found to be in violation or beyond the
                  scope of any constitution or law. If (i) a Member or the
                  Warrantors' Representative is uncertain as to the
                  Representative's duties or rights hereunder, (ii) has received
                  any notice, advice, direction or other document from any other
                  party with respect to this Agreement or the Purchase Agreement
                  which, in the Member's or the Warrantors' Representative's
                  opinion, is in conflict with any of the provisions of this
                  Agreement or the Purchase Agreement, or (iii) is aware that
                  dispute has arisen with respect to this Agreement or the
                  Purchase Agreement, each Member and the Warrantors'
                  Representative shall be entitled, without liability to the
                  Warrantors to use their best efforts to perform their duties
                  under this Agreement or the Purchase Agreement until the
                  Warrantors' Representative is directed otherwise in writing by
                  an order, decree or judgement of a court of competent
                  jurisdiction which has been finally affirmed on appeal or
                  which by lapse of time or otherwise is no longer subject to
                  appeal or by an accountants' or arbitrators' determination as
                  provided in the Purchase Agreement.
                  14.6     The aforesaid indemnities shall remain in full force
                  and effect against any of the parties for a period equal to
                  the applicable statute of limitation for such claim; provided,
                  however, that if prior to the expiration of such period any
                  claim for indemnification has been asserted but not fully
                  determined, such period will be extended as to such claim,
                  until it is finally concluded. All rights, protections and
                  indemnities contemplated herein shall be available to each
                  Member with respect to actions or omissions while a member of
                  the Committee despite such Member's resignation or removal
                  from the Committee.
                  14.7     If a Member or the Warrantors' Representative is
                  entitled to indemnification, the Warrantors shall each be
                  individually liable in an amount equal to the amount of
                  indemnification multiplied by a fraction, the numerator of
                  which is the number of Escrow Shares owned by a Warrantor and
                  the denominator of which is the number of Escrow Shares owned
                  by all of the Warrantors.
                  14.8     A decision, act, consent or instruction of the
                  Warrantors' Representative shall constitute a decision of all
                  Warrantors and shall be final, binding and conclusive upon
                  each of such Warrantors, and the Escrow Agent and the
                  Purchaser may rely upon any such decision, act, consent or
                  instruction of the Warrantors' Representative as being the
                  decision, act, consent or instruction of each and every such
                  Warrantor.
                  14.9     Each Warrantor shall have voting rights with respect
                  to that number of Escrow Shares and New Shares contributed to
                  the Escrow Fund on behalf of such Warrantor (and on any voting
                  securities added to the Escrow Fund in respect of such Escrow
                  Shares) so long as 
                                      -35-
   38
                  such Escrow Shares and New Shares or other voting securities
                  are held in the Escrow Fund. As the record holder of such
                  shares or securities accordingly the Purchaser shall ensure
                  that the Escrow Agent shall vote such shares in accordance
                  with the instructions of the Warrantors having the beneficial
                  interest therein and shall promptly deliver copies of all
                  proxy solicitation materials to such Warrantors. The Purchaser
                  shall show the Escrow Shares and the New Shares contributed to
                  the Escrow Fund (as such expressions are defined in this
                  Agreement or the Escrow Agreement) as issued and outstanding
                  on its balance sheet.
                  14.10    Each of the Warrantors acknowledges that the
                  Warrantors' Representative shall act for each Warrantor for
                  and on behalf of the Warrantors, to give and receive notices
                  and communications on behalf of the Warrantors, to enter into
                  and perform the Escrow Agreement, to authorise delivery to the
                  Purchaser of Escrow Shares and New Shares or other property
                  from the Escrow Fund in satisfaction of claims by the
                  Purchaser, to object to such deliveries, to agree to,
                  negotiate, enter into settlements and compromises of, and
                  demand arbitration and comply with orders of courts and awards
                  of arbitrators with respect to such claims, and to take all
                  actions necessary or appropriate in the judgement of the
                  Vendors' Representative for the accomplishment of the
                  foregoing. The Vendors' Representative shall act by vote or
                  written action or consent of a 75% of the members of the
                  Committee.
         15.      LAW AND JURISDICTION
                  15.1     This agreement shall be governed by and construed in
                  accordance with English law and each party to this agreement
                  submits to the non-exclusive jurisdiction of the English
                  courts.
                  15.2     The Vendors and the Purchaser agree that any legal
                  action or proceeding arising out of or in connection with this
                  agreement may be brought in the High Court of Justice in
                  England, and the Vendors and the Purchaser hereby irrevocably
                  submit to the exclusive jurisdiction of such court in
                  connection with any such legal action or proceedings.
                  15.3     The Warrantors irrevocably appoint the Company's
                  Solicitors as their agent to accept service of legal
                  proceedings in connection with all matters arising out of this
                  agreement and the transactions contemplated by this agreement
                  and agree that any writ, judgment or other notice of legal
                  process in connection with any such legal action or
                  proceedings shall be sufficiently served if delivered to the
                  Company's Solicitors.
                  15.4     The Purchaser irrevocably appoints the Purchaser's
                  Solicitors as its agent to accept service of legal proceedings
                  in connection with all matters arising out of this agreement
                  and the transactions contemplated by this agreement and agrees
                  that any writ, judgment or other notice of legal process in
                  connection with any such legal action or proceedings shall be
                  sufficiently served if delivered to the Purchaser's
                  Solicitors.
                                      -36-
   39
The parties to this agreement have signed and entered into this agreement on the
date and year first written above.
                                      -37-
   40
                                   SCHEDULE 1
                    THE VENDORS AND THE CONSIDERATION SHARES
      1                 2                3            5                         4
    NAME             ADDRESS          NUMBER    OPTION SHARES          CONSIDERATION SHARES
                                     OF SALE
                                      SHARES
                                                               ----------------------------------
                                                                    4.1                4.2
                                                                     3I               ESCROW
                                                               CONSIDERATION          SHARES
                                                                   SHARES
                                                                                4.2(a)     4.2(b)
                                                                                 FIRST     SECOND
                                                                                ESCROW     ESCROW
                                                                                SHARES     SHARES
------------   --------------------  ---------  -------------  --------------   ---------  ------
                                                                            
Simon Best     6B ▇▇▇▇▇▇ ▇▇▇▇▇▇      10,000 B      10,000           Nil         94,931     54,869
               Road                  ordinary
               ▇▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇     shares
▇▇▇ ▇▇▇▇       ▇ ▇▇▇▇▇▇ ▇▇▇▇         4,000 B        7,500           Nil         63,245     36,555
               ▇▇▇▇▇▇▇▇▇ ▇▇▇ ▇▇▇     ordinary
                                      shares
▇▇▇ ▇▇▇▇▇▇     ▇ ▇▇▇ ▇▇▇▇▇ ▇▇▇▇      12,000 C        Nil            Nil         52,472     30,328
               Eddleston             ordinary
               Peebleshire            shares
▇▇▇▇ ▇▇▇▇▇     ▇ ▇▇▇▇▇ ▇▇▇▇▇         2,000 B        6,000           Nil         33,270     16,226
               ▇▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇    ordinary
                                      shares
▇▇▇ ▇▇▇▇▇      ▇▇▇▇▇▇ ▇▇▇▇ House        Nil         5,000           Nil         28,074     11,281
               ▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇
               ▇▇▇▇▇▇▇▇▇▇
               ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇
▇▇▇▇ ▇▇▇▇▇     29 Broomie Knowe,     8,000 C         Nil            Nil         19,519     19,230
               Lasswade              ordinary
               Midlothian             shares
▇▇▇▇▇▇         ▇▇▇▇▇▇                172,000         Nil            Nil         253,488    146,512
Institute      Biotechnology Centre     B
               Roslin                ordinary
               Midlothian ▇▇▇▇ ▇▇▇    shares
3i Group plc   ▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇      172,000         Nil         1,240,000        ▇▇▇        ▇▇▇
               ▇▇▇▇▇▇                   ▇
               ▇▇▇  ▇▇▇              ordinary
                                      shares
                                     630,667
                                         D
                                     ordinary
                                      shares
                                                                        545.000    315,000
                                      -38-
   41
                                   SCHEDULE 2
                                   THE COMPANY
                                                                                 
Name:                           Roslin Bio-Med
Former Names:                   None
Number:                         SC179263
Date of Incorporation:          1 October 1997
Registered Office:              Roslin Biotechnology Centre
                                Roslin
                                Midlothian
Authorised Share Capital:       L. 446,880 divided as follows:
                                    A ordinary P. 1.00 shares x 172,000            =      L. 172,000
                                    B ordinary P. 1.00 shares x 248,000                   =        L.248,000
                                    C ordinary P. 1.00 shares x 20,000                    =        L 20,000
                                    D ordinary one ▇▇▇▇▇ shares x 630,667                 =        L.6,306
Issued Share Capital:           L. 386,306.67
Shareholders:                   3i plc                172,000 A ordinary shares
                                                      630,667 D ordinary shares
                                Roslin Institute      172,000 B ordinary shares 
                                Simon Best             10,000 B ordinary shares 
                                ▇▇▇ ▇▇▇▇                4,000 B ordinary shares 
                                ▇▇▇▇ ▇▇▇▇▇              2,000 B ordinary shares 
                                ▇▇▇ ▇▇▇▇▇▇             12,000 C ordinary shares 
                                ▇▇▇▇ ▇▇▇▇▇              8,000 C ordinary shares
Directors:                      Simon Best
                                ▇▇▇ ▇▇▇▇▇
                                ▇▇▇▇ ▇▇▇▇▇
                                ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇
                                ▇▇▇ ▇▇▇▇
                                ▇▇▇ ▇▇▇▇▇▇
Secretary:                      Piers Lincoln
Accounting Reference Date:      28 February
Last Accounts:                  None filed
Last Annual Return:             9 November 1998
Charges:                        None
                                      -39-
   42
                                   SCHEDULE 3
                                   COMPANY IPR
                                     PART A
                                     PATENTS
                SCHEDULE OF NUCLEAR TRANSFER PATENT APPLICATIONS
*       [*]
--------
* Material has been omitted pursuant to a request for confidential treatment.
Such material has been filed separately with the Securities and Exchange
Commission.
                                      -40-
   43
*       [* 2 pages omitted]
--------
* Material has been omitted pursuant to a request for confidential treatment.
Such material has been filed separately with the Securities and Exchange
Commission.
                                      -41-
   44
*[*]
                                     PART B
                                   TRADE MARKS
                2 unregistered - see artwork attached as Annex A
                                     PART C
                                    LICENCES
1.      License Agreement dated 7 April 1998 between Roslin Institute and the
        Company.
2.      Research Agreement dated 7 April 1998 between Roslin Institute and the
        Company.
--------
* Material has been omitted pursuant to a request for confidential treatment.
Such material has been filed separately with the Securities and Exchange
Commission. 
                                      -42-
   45
                                   SCHEDULE 4
                REPRESENTATIONS AND WARRANTIES OF THE WARRANTORS
Save where expressly provided, defined terms shall have the same meaning as in
clause 1 of this agreement.
                                     PART A
                         TITLE AND INVESTMENT WARRANTIES
For the avoidance of doubt and notwithstanding any other provisions of this
agreement each of the following Warranties in this Part A of Schedule 4 is given
severally by each Vendor and accordingly it is agreed by the Purchaser that none
of the other Vendors should be liable or responsible for any breach of the
following Warranties by any of the other Vendors:-
         1. The Vendor has all requisite legal and, to the extent applicable,
         corporate power, and authority to enter into and perform its
         obligations under this agreement and to consummate the transactions
         contemplated hereby in so far as applicable to the Vendor. The
         execution, delivery and performance of this agreement and the
         consummation of the transactions contemplated hereby in so far as
         applicable to the Vendor have been duly and validly approved and
         authorised by all necessary action, including, if applicable, corporate
         action, by or on behalf of such Vendor. This agreement has been duly
         executed and delivered by such Vendor and constitutes a valid and
         binding obligation of the Vendor, subject to the laws of general
         application relating to bankruptcy, insolvency and the relief of
         debtors and rules of law governing specific performance, injunctive
         relief and equitable remedies. No consent, approval, order or
         authorisation of, or registration, declaration or filing with, any
         Governmental Entity, which has not been obtained is required by or with
         respect to the Vendor in connection with the execution and delivery of
         this agreement by the Vendor or the consummation by the Vendor of the
         transactions contemplated hereby in so far as applicable to the Vendor.
         2. The Vendor is the sole owner of the Sale Shares reflected next to
         such Vendor's name in column 3 of schedule 1 of this agreement and has
         or will have, as at Completion, good and valid title to such Sale
         Shares free and clear of all Encumbrances whatsoever. The Vendor
         represents that he or it has or will have, as of the Completion, full
         right, power and authority to sell, transfer and deliver such Sale
         Shares to the Purchaser, and, upon delivery of the certificate or
         certificates therefor duly endorsed for transfer to the Purchaser and
         the Purchaser's payment for and acceptance thereof (subject, however to
         any applicable stamp duty or other taxes, levies and duties being paid
         thereon and amendment thereafter of the Register of Members of the
         Company to reflect such transfer), will transfer to the Purchaser good
         and valid title thereto free and clear of any
                                      -43-
   46
         Encumbrance. The Vendor is not party to any voting trust, agreement or
         arrangement affecting the exercise of the voting rights of the Sale
         Shares. There is no action, proceeding, claim or, to the Vendor's
         knowledge, investigation against the Vendor or the Vendor's assets,
         properties or, as applicable, any of the Vendor's respective officers
         or directors, pending or, to the Vendor's knowledge, threatened, at law
         or in equity, or before any court, arbitrator or other tribunal, or
         before any administrative law judge, hearing officer or administrative
         agency relating to or in any other manner impacting upon the Sale
         Shares held by such Vendor.
         3. The execution, delivery and performance of this agreement do not,
         and the consummation of the purchase of Sale Shares and the other
         transactions contemplated by this agreement will not conflict with or
         result in a violation of the memorandum and articles of association,
         bylaws, partnership agreement or other applicable charter document of
         the Vendor, or conflict with, or (with or without notice or lapse of
         time, or both) result in a termination, breach, impairment or violation
         of, or constitute a default or result in the creation or imposition of
         any lien, charge or encumbrance upon any of the Vendor's Sale Shares
         under, (a) any instrument, indenture, lease, mortgage or other
         agreement or contract to which the Vendor is a party or to which such
         Vendor or any of such Vendor's assets or properties may be subject or
         (b) any applicable federal, state, local or foreign judgement, writ,
         decree, order, ordinance, statute, rule or regulation applicable to the
         Vendor or the Vendor's assets or properties. The consummation of the
         purchase of the Vendor's Sale Shares and the other transactions
         contemplated by this agreement in so far as applicable to the Vendor
         will not require the consent of any third person which has not been
         obtained with respect to the rights, licenses, franchises, leases or
         agreements of the Vendor.
         4. The Vendor hereby acknowledges that the Vendor has read this
         agreement, the Escrow Agreement, the Registration Rights Agreement and
         the other documents to be delivered in connection with the consummation
         of the transactions contemplated hereby in so far as applicable to him
         or it and has made an independent examination of the transactions
         contemplated hereby (including the tax consequences thereof) in so far
         as applicable to him or it. The Vendor acknowledges that the Vendor has
         been afforded an opportunity to consult with and has relied upon the
         advice, if any, of the individual Vendor's relevant legal counsel,
         financial advisors, or accountants with respect to the transactions
         contemplated hereby to the extent that each Vendor has deemed necessary
         and the Purchaser's Warranties and the other undertakings of the
         Purchaser in this agreement and the other documentation contemplated
         hereby, and has not been advised or directed by Purchaser, the Company
         or their respective officers, employees, legal counsel or other
         advisors in respect of any such matters and has not relied on any such
         parties in connection with this agreement and the transactions
         contemplated hereby in so far as applicable to him or it.
         5. The Vendor hereby confirms, that the Consideration Shares to be
         allocated or issued to him or it will be acquired for investment for
         his or its own account, not as a nominee or agent, and not with a
         present intention to resell or distribute any part thereof,
                                      -44-
   47
         and that the Vendor has no present intention of selling, granting any
         participation in, or otherwise distributing the same. The Vendor
         further represents that the Vendor does not presently have any
         contract, undertaking, agreement or arrangement with any person to
         sell, transfer or grant participations to such person or to any third
         person, with respect to any of the Consideration Shares. The Vendor has
         not been formed for the specific purpose of acquiring the Consideration
         Shares.
         6. The Vendor understands that the Consideration Shares have not been,
         and will not be, registered under the Securities Act, by reason of a
         specific exemption from the registration provisions of the Securities
         Act which depends upon, among other things, the bona fide nature of the
         investment intent and the accuracy of the Vendor's representations as
         expressed herein. The Vendor understands that the Consideration Shares
         are "restricted securities" under applicable U.S. federal and state
         securities laws and that, pursuant to these laws, the Vendor must hold
         the Consideration Shares indefinitely unless they are registered with
         the Securities and Exchange Commission and qualified by state
         authorities, or an exemption from such registration and qualification
         requirements is available. The Vendor acknowledges that the Purchaser
         has no obligation to register or qualify the Consideration Shares for
         resale except as set forth in this agreement and the Registration
         Rights Agreement. The Vendor further acknowledges that if an exemption
         from registration or qualification is available, it may be conditioned
         on various requirements including, but not limited to, the time and
         manner of sale, the holding period for the Consideration Shares, and on
         requirements relating to the Purchaser which are outside of the
         Vendor's control
         7. The Vendor understands that the Consideration Shares and any
         securities issued in respect of or exchange for the Consideration
         Shares, may bear the following legend:
         "THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
         UNDER THE SECURITIES ACT OF 1933, AND HAVE BEEN ACQUIRED FOR INVESTMENT
         AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE SALE OR DISTRIBUTION
         THEREOF. NO SUCH SALE OR DISTRIBUTION MAY BE EFFECTED WITHOUT AN
         EFFECTIVE REGISTRATION STATEMENT RELATED THERETO OR AN OPINION OF
         COUNSEL IN A FORM SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS
         NOT REQUIRED UNDER THE SECURITIES ACT OF 1933."
         8. If the Vendor is not a United States person (as defined by Section
         7701(a)(30) of the United States Internal Revenue Code of 1986, as
         amended), such Vendor hereby represents that it has satisfied itself as
         to the full observance of the applicable laws of its jurisdiction in
         connection with any invitation to subscribe for the Consideration
         Shares including (i) the legal requirements within its jurisdiction for
         the purchase of the Consideration Shares, (ii) any foreign exchange
         restrictions applicable to such purchase, (iii) any governmental or
         other consents that may need to be obtained, and (iv) the income tax
         and other tax consequences, if any, that may be relevant to the
         purchase, holding, redemption, sale, or transfer of the Consideration
         Shares.
                                      -45-
   48
                                     PART B
                              COMMERCIAL WARRANTIES
The Company
                  1.1 The Company has since its inception carried on the
                  business of a research and development company.
         2.       The share capital
                  2.1 The Sale Shares constitute the whole of the issued and
                  allotted share capital of the Company. All of the Sale Shares
                  are fully paid or credited as fully paid.
                  2.2 There is not outstanding any loan capital of the Company.
                  2.3 Other than as set forth in clause 2.1 of this schedule and
                  in the Warrantors' Disclosure Letter, there are no other
                  outstanding shares of capital stock or voting securities of
                  the Company, and there are no other options, warrants, calls,
                  rights, commitments or agreements of any character to which
                  the Company is a party or by which it is legally bound
                  obligating the Company to issue, deliver, sell, repurchase or
                  redeem, or cause to be issued, delivered, sold, repurchased or
                  redeemed, any shares of the capital stock of the Company or
                  obligating the Company to grant, extend or enter into any such
                  option, warrant, call, right, commitment or agreement.
         3.       Information Provided
                  3.1 The facts set out in the specific disclosures set out in
                  the Warrantors' Disclosure Letter (but excluding any documents
                  annexed to the Warrantors' Disclosure Letter which are dealt
                  with in paragraphs 3.2 and 3.3 below) are true and accurate in
                  all material respects.
                  3.2 With regard to documents annexed to the Warrantors'
                  Disclosure Letter and which are the product of the Warrantors,
                  the facts (but expressly excluding any expressions of opinions
                  or matters relating to financial matters) are true and
                  accurate in all material respects.
                  3.3 With regard to any documents annexed to the Warrantors'
                  Disclosure Letter (other than those documents referred to in
                  paragraph 3.2 above), the Warrantors have provided such
                  documents to the Purchaser in good faith and, so far as the
                  Warrantors are aware, the facts (but expressly excluding any
                  expressions of opinion or matters relating to financial
                  matters) set out in such documents are not misleading in any
                  material respect.
                                      -46-
   49
                  3.4 So far as the Warrantors are aware every document annexed
                  to the Warrantors' Disclosure Letter is a true and complete
                  copy of the originaL
         4.       The Accounts
                  4.1 A true, complete and accurate copy of the Accounts is
                  annexed to the Warrantors' Disclosure Letter.
                  4.2 The Accounts were prepared by the Company's Accountants
                  under the historical cost convention and complied with and
                  were prepared in accordance with all applicable Accounting
                  Requirements.
                  4.3      The Accounts:
                           (a) give a true and fair view of the assets and
                           liabilities of the Company as at the Accounts Date
                           and of its losses for the Financial Year ended on the
                           Accounts Date;
                           (b) make appropriate provision for, reserve for or
                           disclose, as appropriate and to the extent required
                           by relevant Accounting Requirements, all liabilities,
                           whether actual, contingent, unquantified or disputed,
                           all capital commitments, whether actual or
                           contingent, and all bad or doubtful debts of the
                           Company as at the Accounts Date in each case, in
                           accordance with all applicable Accounting
                           Requirements; and
                           (c) make appropriate provision for or reserve for
                           deferred Taxation in accordance with all applicable
                           Accounting Requirements.
                  4.4 In the Accounts fixed assets have been depreciated in
                  accordance with SSAP 12 as amended by FRS 3.
                  4.5 No amount included in the Accounts in respect of any
                  asset, whether fixed or current, exceeds its purchase price or
                  its production cost (as defined in the Companies Act) or (in
                  the case of current assets) its estimated net realisable value
                  as at the Accounts Date.
                  4.6 The values attributed to the assets of the Company in the
                  Accounts as at the Accounts Date are such that if sold or
                  realised at that value:
                           (a) no claim for corporation tax in respect of any
                           chargeable gain would be made; and
                           (b) no liability to Taxation would arise as a result
                           of any claim in respect of a balancing charge,
                                      -47-
   50
         and, so far as the Warrantors are aware, none of such assets has been
         acquired for any consideration in excess of its net realisable value as
         at the date of such acquisition or otherwise than by way of a bargain
         at arm's length.
5.
         There is no paragraph 5
         6.       Position since the Accounts Date
                  6.1 Save as disclosed in the Warrantors' Disclosure Letter,
                  since the Accounts Date:
                           (a) no dividend or other distribution (within the
                           meaning of that expression as contained in section
                           209 or 210 or 418 of ICTA) has been declared, paid or
                           made by the Company;
                           (b) the Company has carried on its business in the
                           ordinary and usual course without any interruption in
                           its nature, scope or manner and so as to maintain the
                           same as a going concern;
                           (c) the Company has not written off any debt in
                           excess of L 10,000 and no debt has been released by
                           the Company on terms that the debtor pays less than
                           the book value of its debt:
                           (d) the Company has not entered into any contract
                           involving expenditure on capital account or the
                           purchase of any capital equipment or other items of a
                           capital nature of a value in excess of L 10,000;
                           (e) the Company has not made any disposal or deemed
                           disposal which might give rise to a liability for
                           corporation tax on chargeable gains otherwise than in
                           the ordinary course of trade;
                           (f) the Company has not acquired or disposed of or
                           agreed to acquire or dispose of any business or any
                           material asset or assumed or acquired any material
                           liability (including any contingent liability)
                           otherwise than in the ordinary course of business;
                           (g) there has been no material adverse change in the
                           assets, liabilities or financial position of the
                           Company and no event, fact or matter has occurred
                           which will or is likely to give rise to any such
                           change;
                           (h) the Company has not disposed of or agreed to
                           dispose of any asset for a consideration payable by
                           instalments where any instalment remains unpaid;
                                      -48-
   51
                           (i) the Company has paid its creditors in accordance
                           with normal payment procedures of the Company,
                           details of such procedures being disclosed in the
                           Warrantors' Disclosure Letter;
                           (j) none of the assets of the Company has been
                           diminished by any negligent, unlawful or fraudulent
                           act of the Warrantors; and
                           (k) no provision in the accounting records of the
                           Company (within the meaning of Section 221 of the
                           Companies Act) has been released; and
         7.       Accounting and Other Records
                  7.1 All the accounting records of the Company (as defined in
                  Section 221 of the Companies Act) have been properly kept in
                  accordance with sections 221 and 222 of the Companies Act, are
                  within the Company's possession and control and all
                  transactions relating to its business have been duly and
                  correctly recorded in all material respects therein and such
                  accounting records taken together disclose with reasonable
                  accuracy, at the date of this agreement, the financial
                  position of the Company at such time.
                  7.2 A copy of all written agreements, deeds and other
                  instruments entered into by the Company are in its possession
                  and controL
         8.       Constitution
                  8.1 A true, complete and accurate copy of the memorandum and
                  articles of association of the Company having embodied within
                  it or annexed to it a copy of each resolution or agreement
                  referred to in section 380 of the Companies Act is annexed to
                  the Warrantors' Disclosure Letter. Such documents contain full
                  details of the rights and restrictions attached to the share
                  capital of the Company, and all such resolutions have been
                  properly passed as resolutions of the Company and filed with
                  the Registrar of Companies within the period for filing
                  required under the Companies Act.
                  8.2 The register of members and statutory books of the Company
                  contains a complete, true and accurate record of the members
                  of the Company and all the other information which they are
                  required to contain under the Companies Act and comply with
                  all the requirements of the Companies Act and all returns
                  particulars resolutions and other documents required to be
                  delivered by the Company to the Registrar of Companies have
                  been duly delivered within the time limits required under the
                  Companies Acts and, so far as the Warrantors are aware, no
                  fines or penalties are outstanding or known to be due.
                  8.3 The Company has not received any written notice of any
                  application or intended application for the rectification of
                  its register of members.
                                      -49-
   52
                  8.4 The only directors of the Company immediately prior to
                  Completion are the persons whose names are listed in the
                  Warrantors' Disclosure Letter and the Company has no alternate
                  or shadow directors.
                  8.5 The Company has not provided any financial assistance
                  within section 151 of the Companies Act or otherwise directly
                  or indirectly for the purchase or the proposed purchase of its
                  own shares.
                  8.6 The Company has not purchased any of its own shares.
                  8.7 The Company has no assets outside the United Kingdom nor
                  does it have a branch, agency or place of business or any
                  permanent establishment (as that expression is defined in the
                  relevant double taxation relief orders current at the
                  Completion Date) outside the United Kingdom.
                  8.8 The Company has no shares or other securities in any other
                  company and has not agreed to acquire any such shares or
                  securities or held any such shares or securities at any time.
                  The Company does not take part in the management of any other
                  company, firm, association or business organisation.
                  8.9 No share in the capital of the Company has been issued or
                  transferred otherwise than in accordance with the memorandum
                  and articles of association of the Company from time to time
                  in force.
         9.       Bank Accounts and Indebtedness
                  9.1 A statement of all the bank accounts and the building
                  society accounts and other investment accounts and of the
                  credit or debit balances thereon of the Company as at no later
                  than the 5th business day prior to the Completion Date is
                  annexed to the Warrantors' Disclosure Letter and since such
                  statement there have been no payments out of any such accounts
                  otherwise than in the ordinary course of trade; and there are
                  no unpresented cheques drawn by the Company for sums exceeding
                  in the aggregate L 10,000.
                  9.2 The Company has not incurred any indebtedness in the
                  nature of borrowings which it has not repaid in full or
                  satisfied.
                  9.3 The amounts borrowed by the Company do not exceed any
                  limitation on its borrowing contained in its articles or
                  association or in any debenture or other deed or document
                  legally binding upon the Company and the Company has not
                  incurred any indebtedness except indebtedness arising in the
                  ordinary course of business
                  9.4 The Company has never had and has no bank overdraft
                  facilities or agreements, acceptance credits or other
                  financial facilities outstanding or available
                                      -50-
   53
                  to it under any existing arrangements between the Company and
                  any lender in place on the Completion Date.
                  9.5 Since the Accounts Date, the Company has not engaged in
                  financing of a type which would not require by law or
                  Accounting Requirements to be shown or reflected in the
                  Accounts, had such arrangement or financing been entered into
                  prior to the Accounts Date.
                  9.6 The Company has not entered into or agreed to enter into
                  any performance or other bonds and no such bonds have been
                  given by any other person on behalf of the Company or in
                  relation to any of its obligations.
                  9.7 There is not, except for the registered charges material
                  details of which are set out in the Warrantors' Disclosure
                  Letter or retention of title provisions arising through the
                  ordinary course of trade, any Encumbrance of any nature
                  (including a conditional obligation) on or affecting the
                  assets or property or any part of the assets or property of
                  the Company nor any debenture whether secured or otherwise or
                  floating charge.
                  9.8 All charges by or in favour of the Company have been
                  registered in accordance with the provisions of the Companies
                  Act or comply with all necessary formalities as to
                  registration or otherwise in any other relevant jurisdiction;
                  and the registered particulars of all charges over any assets
                  of the Company are complete and accurate in all material
                  respects.
         10.      Debts/Unpaid Liabilities
                  10.1 No part of the sum shown in the Accounts in respect of
                  debtors is represented by debts which were then more than 90
                  days overdue for payment and not provided for therein.
                  10.2 Except to the extent to which provision or reserve is
                  made in the Accounts the Warrantors are not aware of any
                  reason why all debts owed to the Company and reflected in the
                  Accounts will not realise their full value and be good and
                  collectable within 90 days of their due date for payment in
                  the normal course of business, and, so far as the Warrantors
                  are aware, none of such debts is subject to any counterclaim
                  or set-off.
                  10.3 The Company is not owed any sums other than debts
                  incurred in the ordinary course of trading.
                  10.4 The Company does not have any unpaid liability where the
                  relevant ▇▇▇▇ or account was received more than 90 days prior
                  to the Completion Date.
                  10.5 The Company is not the guarantor of any debt or unpaid
                  liability of any other party.
                                      -51-
   54
         11.      Assets
                  11.1 The Company has no plant and machinery.
                  11.2 All vehicles and office furniture and equipment used by
                  the Company are its property both legally and beneficially and
                  the Company has a good and valid title thereto and none is the
                  subject of any Encumbrance.
                  11.3 All office furniture and equipment owned and/or used by
                  the Company are in its possession and control and are in
                  reasonable repair and condition fair wear and tear excepted
                  having regard to their age; are regularly maintained in
                  accordance with applicable technical standards, safety
                  regulations and the provisions of any applicable agreement and
                  are in satisfactory working order.
                  11.4 Copies of maintenance contracts for the assets of the
                  Company (except for the Computer System) which have maintained
                  by independent or specialist contractors are annexed to the
                  Warrantors' Disclosure Letter.
                  11.5 The list of assets of the Company annexed to the
                  Warrantors' Disclosure Letter comprises a record of all the
                  vehicles, equipment, furniture and other assets owned or
                  possessed by the Company and such list is true and complete in
                  all material respects.
                  11.6 Save as disclosed in the Warrantors' Disclosure Letter,
                  the Company has not entered into any leasing or hiring
                  agreement, hire purchase agreement, conditional sale or credit
                  sale agreement, agreement for payment on deferred terms or any
                  similar agreement or arrangement and is not in material breach
                  of such agreements.
         12.      Intellectual Property
         (The warranties in this Section 12 do not apply to the Software which
         is dealt with in Section 14).
                  12.1 The Company is the sole legal and beneficial owner of all
                  the Company IPR (save for the Intellectual Property which is
                  the subject of the Licenses) and all Company IPR is
                  subsisting.
                  12.2 The Company has not entered into any agreements, licenses
                  or created any Encumbrances affecting to the Company IPR or
                  restricting its use by the Company in any way and for the
                  purposes of this Warranty, Encumbrance shall be defined as any
                  mortgage, security, interest, lien, pledge, hypothecation,
                  assignment by way of security, right of pre-exemption, option,
                  charge, covenant or restriction.
                                      -52-
   55
                  12.3 In so far as any of the Patents are registrable within
                  the territories specified in schedule 3 and save as disclosed
                  in the Warrantors' Letter:
                           (a) all relevant registrations and applications
                           therefor have been made or are in the name of the
                           Company or (in the case of the Intellectual Property
                           which is the subject of the License Agreement) the
                           Roslin Institute (Edinburgh), Biotechnology and
                           Biological Sciences Research Council and Ministry of
                           Agriculture, Fisheries and Food ("the Patent
                           Proprietors");
                           (b) all application and renewal fees due to date have
                           been duly paid; and
                           (c) The Company (and in relation to the Intellectual
                           Property which is the subject of the License
                           Agreement, the Patent Proprietors) has done
                           everything necessary to date in relation to such
                           applications for registrations and all such
                           applications are proceeding normally and there are no
                           material facts of which the Warrantors are aware
                           which could significantly undermine those
                           applications or reduce to a significant extent the
                           scope of protection of any patents arising from such
                           applications.
                  12.4 There are no circumstances which could entitle a third
                  party (including any of the Warrantors) to a license,
                  permission, consent or assignment of or in respect of any of
                  the Company IPR or to call for or exercise any right to use or
                  work under any of the Company IPR or which could provide a
                  third party with a defence to patent infringement proceedings
                  under section 44 Patents Act or any provision having an
                  equivalent effect in any jurisdiction.
                  12.5 Except for matters done in the course of applying for and
                  prosecuting the Patents, nothing has been done or omitted to
                  be done by the Company or the Patent Proprietors whereby any
                  person is able to obtain cancellation or rectification or any
                  other modifications of any registration of any of the Patents
                  in any jurisdiction in which they are currently applied for.
                  12.6 As far as the Warrantors are aware the Company does not
                  own or use either individually or with any person any
                  Intellectual Property other than the Company IPR.
                  12.7 There is no impediment or restriction on the Company's
                  use and exercise of any of the Company IPR and so far as the
                  Warrantors are aware the use and exercise does not constitute
                  an infringement of any intellectual property owned by any
                  third party.
                                      -53-
   56
                  12.8 Neither the Company nor any of the directors or employees
                  or consultants of the Company are party to or bound by an
                  agreement for sharing, exchanging, passing or otherwise
                  transferring Company IPR to any third party.
                  12.9 No notice of any actions, claims, counterclaims,
                  applications or allegations impugning the validity or
                  enforceability of any of the Patents Agreements or (save in
                  relation to Intellectual Property which is the subject of the
                  License) the Company's ownership thereof has been received by
                  the Company and all material facts of which the Warrantors are
                  aware that such a claim is going to be made by any third party
                  has been Disclosed.
                  12.10 The Company has put in place procedures set out in the
                  Warrantors' Disclosure Letter designed to ensure that no act
                  is done or omitted to be done which has resulted or which may
                  result or is capable of resulting in any breach or
                  infringement of any third party's Intellectual Property.
                  12.11 The Warrantors Disclosure Letter comprises a complete
                  list of all licenses (other than implied licences) and
                  agreements pursuant to which the Company uses any Intellectual
                  Property owned by any third party. No notice to terminate, or
                  of any breach or material dispute of, any of the Licenses or
                  agreements so disclosed has been served by or received by the
                  Company and so far as the Warrantors are aware the Company has
                  not done or omitted to do any act which could amount or result
                  in any such breach.
                  12.12 As far as the Warrantors are aware, the Licensors have
                  at all times performed and observed the terms of the Licenses
                  in all material respects.
                  12.13 The Company has not made any claim or allegation against
                  any third party alleging infringement of any of the Company
                  IPR and so far as the Warrantors are aware, there are no
                  facts, matters or circumstances which could give rise to any
                  such action, claim or allegation.
                  12.14 The Company has not received notice of any claims
                  against the Company under any contract or under the Patents
                  Acts (or otherwise) for employee compensation in respect of
                  any Company IPR or any other like claim by a self-employed
                  contractor.
                  12.15 The Company IPR includes a list of all registered
                  intellectual property rights held by the Company which is
                  complete in all material respects.
                  12.16 The trade marks listed in Part 3 of the schedule
                  comprise all the trademarks used by the Company in connection
                  with its business.
                  12.17 The Company does not own or use any brand, trade or
                  business name in connection with its business other than the
                  trade marks listed in Part 3 of the Schedule.
                                      -54-
   57
                  12.18 The Confidential Information has at all times been
                  maintained by the Company so as to endeavour to preserve its
                  confidentiality. In so far as the Confidential Information or
                  any part thereof has been disclosed to any third parties it
                  has been disclosed under the terms of the confidentiality
                  agreements listed in the Warrantors' Disclosure Letter.
                  12.19 The Company has not registered any trade marks or design
                  rights.
         13.      Employees and Consultants
                  13.1 The particulars of the name, job title, date of
                  commencement of employment and/or appointment to office, age,
                  notice period, salary, benefits (pecuniary or otherwise),
                  confidentiality obligations and all other written terms and
                  conditions of employment or engagement of each director,
                  consultant or employee of the Company set out in the
                  Warrantors' Disclosure Letter are true and accurate in all
                  material respects.
                  13.2 There are no outstanding offers of employment or
                  engagement made to any person by the Company and there is no
                  one who has accepted an offer of employment or engagement made
                  by the Company but who has not yet taken up that employment or
                  engagement.
                  13.3 All service and employment agreements entered into by the
                  Company and in force may be terminated by not more than six
                  months' notice and without payment of compensation or damages
                  (other than any payments arising under statute or payment for
                  wrongful dismissal). All consultancy agreements entered into
                  by the Company may be terminated by not more than six months'
                  notice without giving rise to any claim for damages or
                  compensation.
                  13.4 No director, employee or, so far as the Warrantors are
                  aware, consultant of the Company:
                           (a) has given or received notice terminating his
                           employment or engagement or altering its terms, and
                           no such person will be entitled as a result of the
                           entering into of this agreement to give notice of
                           termination or to claim for any payment or benefit or
                           to treat himself as being released from any
                           obligation; or
                           (b) is currently on sick leave which (as of the
                           Completion Date) has been continuing for more than 14
                           consecutive days; or
                           (c) is currently on maternity leave.
                  13.5 There are no outstanding arrears of salary, wages,
                  holiday pay or other remuneration due to any of the Company's
                  directors, consultants or employees.
                                      -55-
   58
                  13.6 Save as disclosed in the Warrantors' Disclosure Letter,
                  since the Accounts Date:
                           (a) no change has been made in the rate or basis of
                           remuneration, fee or the pension or other benefits
                           paid to or provided for any director, consultant or
                           employee of the Company; and
                           (b) no change has been made in any other terms of
                           employment or engagement of any such director,
                           consultant or employee.
                  13.7 The Company has not entered into any agreement or given
                  any assurance (whether legally binding or not) or created any
                  expectation regarding any future variation in any contract of
                  employment or so far as the Warrantors are aware in any
                  consultancy agreement in respect of any of its directors,
                  employees or consultants or any agreement imposing an
                  obligation on the Company or any expectation on the part of
                  any director, employee or, so far as the Warrantors are aware,
                  consultant to increase the basis and/or rates of remuneration
                  or payment and/or the provision of other benefits to or on
                  behalf of any of its directors, employees or consultants at
                  any future date.
                  13.8 The Company does not operate any share option scheme,
                  employee trust, cash bonus scheme or other employee incentive
                  arrangement.
                  13.9 The Company has not entered into any union membership,
                  security of employment, redundancy, recognition or other
                  collective agreement (whether legally binding or not) with a
                  trade union, association of trade unions, works council, staff
                  association or other organisation or body of employees, nor
                  has the Company done any act which might be construed as
                  recognition, nor has the Company in respect of any employee
                  entered into any agreement with any trade union or other
                  employee body representing employees concerning the
                  introduction of new equipment or technology.
                  13.10 The Company is not involved in any industrial or trade
                  dispute or any dispute or negotiation regarding a claim of
                  material importance or the dismissal or varying of the terms
                  and conditions of employment of any present or former employee
                  and there are no facts known to the Warrantors which indicate
                  that there may be any such dispute or negotiation.
                  13.11 No disciplinary action, whether formal or informal, has
                  been taken against and no grievance or complaint of sex, race
                  or disability discrimination, whether formal or informal, has
                  been raised with the Company by any employee since the
                  Company's inception.
                  13.12 The Warrantors are not aware of any facts or matters
                  affecting any of the employees of the Company which might
                  reasonably be considered grounds for
                                      -56-
   59
                  dismissing such employee or for warning such employee that the
                  continuation of any conduct or behaviour might lead to
                  dismissal and no warning (whether formal or informal) has been
                  given to any employee and no notice of termination of
                  employment has been given to or received from any such
                  employee.
                  13.13 Insofar as the Warrantors are aware, no past or present
                  director, employee or consultant has asserted any claim
                  against the Company for loss of office or arising out of the
                  termination of his office or employment or in respect of any
                  accident or injury which does not fall within the Company's
                  insurances and so far as the Warrantors are aware there is no
                  event which would or might reasonably be expected to give rise
                  to any such claim.
                  13.14 Insofar as the Warrantors are aware, no liability has
                  been or may be incurred by the Company for breach of any
                  contract of service or for services, for redundancy payments,
                  protective awards or for compensation for wrongful dismissal
                  or unfair dismissal or for failure to comply with any order
                  for the reinstatement or re-engagement of any employee or for
                  any other liability accruing from the actual or proposed
                  termination or variation of any contract of employment or for
                  services.
                  13.15 No gratuitous payment has been made or promised by the
                  Company:
                           (a) in respect of or contingent upon the sale of the
                           Sale Shares; or
                           (b) in connection with the actual or proposed
                           termination or suspension of employment or engagement
                           or variation of any contract of employment or
                           engagement of any present or former director,
                           consultant or employee.
                  13.16 So far as the Warrantors are aware, all monies paid or
                  goods or services provided directly or indirectly or made
                  available (whether by way of the provision of a credit card or
                  otherwise howsoever) by the Company whether as principal or
                  surety to any of its directors or employees whether in respect
                  of emoluments of employment or reimbursement or otherwise
                  howsoever have been expenditures properly incurred by the
                  Company so as to be deductible in computing its taxable
                  profits and have been declared to the Inland Revenue.
                  13.17 There is no person previously employed by the Company
                  who now has right to return to his work or in respect of whom
                  the Company has been ordered by an Employment Tribunal that he
                  be reinstated by the Company under the provisions of the
                  Employment Rights ▇▇▇ ▇▇▇▇.
                  13.18 The Company has not made any loans or quasi loans (as
                  defined in the Companies Act) to or entered into any credit
                  transaction (as so defined) with any of its directors or
                  employees.
                                      -57-
   60
                  13.19 No person has been employed since the inception of the
                  Company who requires a work permit without such a permit being
                  in force.
                  13.20 Since its inception, the Company has not been a party to
                  any relevant transfer as defined in the Transfer of
                  Undertakings (Protection of Employment) Regulations 1981 nor
                  has the Company failed to comply with any duty to inform and
                  consult any independent trade union under such Regulations.
                  13.21 So far as the Warrantors are aware save as provided or
                  contemplated by this agreement, no director, consultant or
                  employee will leave the employment or engagement of the
                  Company as a result of the signing of this agreement or the
                  matters or transactions effected by it.
                  13.22 So far as the Warrantors are aware the Company has in
                  relation to each of its directors and employees (and so far as
                  relevant to each of its former directors and employees)
                  complied with all obligations imposed on it by Article 119 of
                  the Treaty of Rome, the Trade Union and Labour Relations
                  (Consolidation) ▇▇▇ ▇▇▇▇, the Employment Rights ▇▇▇ ▇▇▇▇ and
                  all other statutes, regulations, codes of conduct and
                  practices relevant to relations between the Company and its
                  directors and employees and the Company has maintained
                  adequate and suitable records regarding their services.
                  13.23 The Company's only employees are Simon Best, Piers
                  Lincoln and ▇▇▇ ▇▇▇▇▇.
                  13.24 The Company's only consultants are as set out in the
                  Warrantors' Disclosure Letter.
                  13.25 I ▇▇▇▇▇ is not entitled to any payments under his
                  contract of employment other than in respect of his notice
                  period.
                  14. Transaction with Warrantor's Affiliates and Computer
                  Systems
                  14.1 There are no:
                           (a) loans made by the Company to any of the
                           Warrantors and/or to any director of the Company
                           and/or to any Warrantor's Affiliate of any of the
                           Warrantors or of any such director;
                           (b) debts owing to the Company by any of the
                           Warrantors and/or any director of the Company and/or
                           by any Warrantor's Affiliate of any of the Warrantors
                           or of any such director.
                  14.2 there are no existing legally binding contracts,
                  transactions or arrangements to which the Company is a party
                  or under which it may be liable and in which any of the
                  Warrantors and/or any director of the Company and/or any
                  Warrantor's
                                      -58-
   61
                  Affiliate of any Warrantor's and/or any Warrantor's Affiliate
                  of any director is interested whether directly or indirectly
                  to any material extent, and, so far as the Warrantors are
                  aware, the Company has not been a party to any such contracts,
                  transactions or arrangements since its inception.
                  14.3 None of the Warrantors nor any director of the Company is
                  engaged or concerned or interested in any way whatsoever (and
                  whether by a holding of shares or otherwise other than any
                  company quoted on a recognised stock exchange, as defined in
                  the Companies Act) in any other business of a similar nature
                  to or competitive with that carried on by the Company.
                  14.4 Save in relation to services provided to the Company
                  pursuant to a Warrantor's employment contract with the Company
                  the Company does not depend in any material respect upon the
                  use of any property, right, asset owned by, or facilities or
                  services provided by any Warrantor or any Warrantor's
                  Affiliate.
                  14.5 The Company has experienced no material or significant
                  mechanical or software failure in respect of the Computer
                  System at any time and the Computer System is effective and
                  operational in all material respects.
                  14.6 The Company has disaster recovery protection for its
                  Computer System and all data has been backed up periodically.
                  14.7 The Company is the beneficial owner free from
                  Encumbrances of all the items of equipment, hardware, firmware
                  and accessories relating to the Computer System and no other
                  person has any claims or rights in respect thereof.
                  14.8 The Company has all the necessary licences to use the
                  Software in the conduct of its business.
                  14.9 Insofar as any Software has been licensed by the Company
                  from any third parties the Company is not in dispute with any
                  licensor and has not done, or omitted to do, any act which
                  might entitle such licensor to terminate that license.
                  14.10 All information and data held by the Company on the
                  Computer System is beneficially owned by the Company free from
                  Encumbrances, and the Company is not subject to any
                  restriction with regard to the use thereof and no third party
                  enjoys any right or permission to copy or hold any such
                  information or data.
                  14.11 There are in existence maintenance and support
                  agreements in respect of all equipment, hardware, firmware,
                  Software and accessories used in the Computer System, and the
                  Company has not done, or omitted to do, any act which might
                  entitle the provider of the maintenance and support services
                  to terminate such agreements or to withhold or refuse to
                  supply any services thereunder; and the
                                      -59-
   62
                  Company is not in dispute with such provider regarding its
                  maintenance and support obligations.
                  14.12 The Computer System comprises all equipment, hardware,
                  firmware, software, including object code, supporting
                  materials and accessories which are reasonably necessary to
                  enable the Company to carry on its business in the same manner
                  and to the same extent as it has been carried on prior to the
                  Completion Date and the rights to use the Computer System or
                  any part thereof will not be adversely affected by the
                  transactions effected by this agreement.
                  14.13 The Company has put in hand all necessary steps to
                  ensure that prior to 31 December 1999 the Computer System and
                  all Software will be Year 2000 Compliant and will comply with
                  all updates of the BSI-DISC PD 2000-1 standard which have been
                  published prior to the Completion Date and the Warrantors have
                  no reason to believe that such steps will not be successful by
                  that date.
         15.      Material Contracts
                  15.1 There is not outstanding any agreement or arrangement to
                  which the Company is a party:
                           (a) which was entered into otherwise than at arm's
                           length;
                           (b) which requires (or confers any right to require)
                           the allotment or issue of any shares, debentures or
                           other securities of the Company now or at any time in
                           the future;
                           (c) which establishes any guarantee, indemnity,
                           suretyship or legally binding comfort arrangement
                           given by the Company in respect of the obligations or
                           solvency of any third party;
                           (d) which establishes any joint venture, co-operation
                           agreement or arrangement, consortium or profit (or
                           loss) sharing agreement or arrangement;
                           (e) which involves future capital expenditure by the
                           Company in excess of L 10,000;
                           (f) which, by virtue of the execution of this
                           agreement or acquisition of the Sale Shares by the
                           Purchaser or other performance of the terms of this
                           agreement will or may result in: (i) any third party
                           being relieved of any material obligation or becoming
                           entitled to exercise any right (including a right of
                           termination or any right of pre-emption or other
                           option); or (ii) the Company being in material
                           default under any such agreement or arrangement or
                           losing any benefit, right or license which it
                                      -60-
   63
                           currently enjoys or (iii) a liability or obligation
                           of the Company being created or increased to any
                           material extent;
                           (g) which will result in the Company becoming liable
                           for any finder's fee, brokerage or other commission
                           in connection with the acquisition of the Sale Shares
                           by the Purchaser;
                           (h) to which any of the provisions of section 317,
                           320 or 330 of the Companies Act apply;
                           (i) pursuant to which the Company has sold or
                           otherwise disposed of any assets or undertaking in
                           circumstances such that it remains subject to any
                           liability (whether contingent or otherwise) which
                           would not normally be retained by a vendor of any
                           assets or undertaking and which is not adequately
                           provided for in the Accounts;
                           (j) which is a power of attorney given by the Company
                           or any other authority other than authority given to
                           a director of the Company which would enable any
                           person to enter into any legally binding contract or
                           commitment on behalf of the Company;
                           (k) which establishes any agency, distributorship,
                           OEM, marketing, purchasing, licensing, management or
                           administration agreement or arrangement of a material
                           nature;
                           (l) which involves payment by reference to
                           fluctuations in the index of retail prices, or any
                           other index, or in the rate of exchange of any
                           currency or any interest rate;
                           (m) which save for service, consultancy and
                           employment agreements has more than three months left
                           to run and is not capable of being terminated by
                           three months' notice or less without payment of
                           compensation or damages;
                           (n) which is a sale or purchase option or similar
                           agreement or arrangement affecting any assets owned
                           or used by the Company; or
                           (o) save to the extent relating to Company IPR,
                           restricting the freedom of the Company to provide and
                           take goods and services by such means and from and to
                           such persons as it may from time to time think fit.
                  15.2 Disclosure is made in the Warrantors' Disclosure Letter
                  of any negotiations or offers or the like which are capable or
                  likely to result in the Company entering into any agreement or
                  arrangement of a kind described in paragraphs 15.1(a) to (o)
                  above.
                                      -61-
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                  15.3 The Company has not assigned or sublet any of its rights
                  under and so far as the Warrantors are aware is not in default
                  under any agreement or arrangement of a kind described in
                  clause 15.1(a) to (o) above to which it is a party and so far
                  as the Warrantors are aware there are no circumstances likely
                  to give rise to any such default, and no other party thereto
                  is in default of any such agreement or arrangement and there
                  are no circumstances expected to give rise to any such
                  default.
                  15.4 So far as the Warrantors are aware, no agreement or
                  transaction to which the Company is a party is invalid or
                  ultra ▇▇▇▇▇ and, so far as the Warrantors are aware, there are
                  no grounds for rescission, breach, avoidance or repudiation of
                  any agreement or other transaction to which the Company is a
                  party.
         16.      Investment Grants
                  16.1 The Company has not received any investment grant,
                  building ▇▇▇▇▇, ▇▇▇▇▇ under any Local Employment Act or under
                  the Industry Acts or any other grant or allowance or loan
                  subsidy or financial assistance
         17.      Insolvency
                  17.1 No resolution has been passed or meeting convened for the
                  winding up of the Company or so far as the Warrantors are
                  aware for an administration order in respect of the Company;
                  so far as the Warrantors are aware, no administrative receiver
                  has been appointed of the business or the whole or any part of
                  the assets or undertaking of the Company; and so far as the
                  Warrantors are aware, there are no circumstances likely to
                  give rise to the appointment of any such administrative
                  receiver or liquidator.
                  17.2 There are no unfulfilled or unsatisfied judgements or
                  court orders outstanding against the Company.
                  17.3 No distress, distraint, charging order, garnishee order,
                  execution or other process which a court or a similar body may
                  use to enforce payment of a debt has been levied or, so far as
                  the Warrantors are aware, applied for in respect of the whole
                  or any part of the property, assets or undertaking of the
                  Company.
                  17.4 In relation to any property or assets held by the Company
                  under any hire, hire purchase, conditional or credit sale,
                  leasing or retention of title agreement or otherwise belonging
                  to a third party, so far as the Warrantors are aware no event
                  has occurred which entitles, or which upon intervention or
                  notice by the third party may entitle, the third party to
                  repossess the property or assets concerned or to terminate the
                  agreement or any license in respect thereof.
                                      -62-
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                  17.5 The Company has not stopped payment nor is it insolvent
                  or unable to pay its debts for the purposes of section 123 of
                  the Insolvency ▇▇▇ ▇▇▇▇.
                  17.6 So far as the Warrantors are aware, the Company has not
                  been a party to any transaction with any third party which, in
                  the event of such third party going into liquidation or an
                  administration order or a bankruptcy order being made in
                  relation to it or to him, would constitute (in whole or in
                  part) a transaction at an undervalue, a preference, an invalid
                  floating charge or an extortionate credit transaction or part
                  of a general assignment of debts, under sections 238 to 245
                  and sections 339 to 344 of the Insolvency ▇▇▇ ▇▇▇▇.
                  17.7 No person who at present is, or who any time since the
                  Company's inception was, a director or officer of the Company
                  is, or at any material time was , subject to any
                  disqualification order under the Companies ▇▇▇ ▇▇▇▇ or under
                  any other legislation relating to the disqualification of
                  directors and officers or so far as the Warrantors are aware
                  was the subject of any investigation or proceedings capable of
                  leading to a disqualification order being made.
         18.      Regulatory Matters
                  18.1 There are now in force and effect all approvals, permits,
                  authorities, consents and licenses of a regulatory nature
                  which the Warrantors believe are necessary for the proper
                  carrying on of the Company's business in the places and in the
                  manner in which such business is now carried on.
                  18.2 The approvals, permits, authorities, consents and
                  licenses referred to in clause 18.1 above are not subject to
                  any unusual or onerous conditions having regard to the
                  conditions which are or may be imposed on approvals, permits,
                  authorities, consents and licenses granted to the third
                  parties carrying on a similar business and the nature of the
                  Company's business and the Company has complied in all
                  material respects with all conditions attached to such
                  approvals, permits, authorities, consents and licenses in so
                  far as applicable to the Company. So far as the Warrantors are
                  aware, there are no investigations, proceedings, enquiries,
                  communications or other circumstances which mean that any such
                  approvals, permits, authorities, consents and licenses would
                  be revoked, cancelled, suspended, modified or not renewed.
                  18.3 The Company has at all times carried on its business in
                  all material respects in accordance with its memorandum and
                  articles of association and, so far as the Warrantors are
                  aware, all applicable laws and regulations (whether in the
                  United Kingdom or any other jurisdiction).
                  18.4 The Company has registered as a data user under Data
                  Protection Act 1984 for all purposes and activities of the
                  Company for which registration is required and, so far as the
                  Warrantors are aware, has complied in all material respects
                  with all other applicable requirements of such Act.
                                      -63-
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                  18.5 No outstanding written notices in relation to any
                  statutory obligation have been served on the Company by any
                  competent regulatory or governmental authority in respect of
                  any of its assets or in respect of any contravention or
                  non-compliance with or alleged contravention or non-compliance
                  with any applicable statutory or regulatory obligation.
                  18.6 The Company is not a party to any agreement, arrangement
                  or concerted practice and is not carrying on any practice
                  which in whole or in part:
                           (a) is or requires to be registered under the
                           Restrictive Trade Practices Act 1976 (whether or not
                           such agreement, arrangement or concerted practice is
                           a non notifiable agreement for the purposes of
                           section 27a of the Restrictive Practices Act 1976);
                           (b) contravenes Articles 85 or 86 of the Treaty of
                           Rome or Articles 53 or 54 of the agreement
                           constituting the European Economic Area or which has
                           been notified to the European Commission or the EFTA
                           Surveillance Authority for a negative clearance or
                           exemption or which ought to have been so notified
                           (other than falling under the Commission's Notice on
                           agreements of minor importance);
                           (c) has been notified by the Company to the Office of
                           Fair Trading for "early guidance" pursuant to
                           schedule 13, paragraph 7 of the Competition ▇▇▇ ▇▇▇▇;
                           (d) so far as the Warrantors are aware, contravenes
                           or is invalidated by any competition, anti-trust,
                           regulatory, monopoly, fair trading, consumer
                           protection or similar legislation in any jurisdiction
                           where the Company has any assets or carries on
                           business.
                  18.7 The Company has not received any process, notice or
                  communication (formal or informal) by or on behalf of the
                  Office of Fair Trading, the Monopolies and Mergers Commission,
                  the Secretary of State for Trade and Industry, any regulator
                  within the meaning of section 54 of the Competition ▇▇▇ ▇▇▇▇,
                  the Commission of the European Communities or the EFTA
                  Surveillance Authority or any authority having jurisdiction in
                  competition, anti-trust, regulatory, monopoly, fair trading or
                  consumer protection matters of an adverse nature in relation
                  to any aspect of the business of the Company or any agreement
                  or arrangement to which it is or is alleged to be a party, and
                  so far as the Warrantors are aware no circumstances exist
                  which might give rise to the Company receiving any such
                  process, notice or communication.
                  18.8 Save in relation to Taxation which is dealt with in Part
                  D of schedule 4, there have not been and so far as the
                  Warrantors are aware are not pending, or in
                                      -64-
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                  existence, any investigations or enquiries by, or on behalf
                  of, any governmental or administrative or other body in
                  respect of any of the affairs of the Company
         19.      Litigation
                  19.1 The Company is not a party (whether as plaintiff or
                  defendant or otherwise) to any claim, litigation, arbitration,
                  prosecution or other legal or quasi legal proceedings or
                  enquiry and has not been engaged in any such claim,
                  proceedings or enquiry since the Company's inception and, so
                  far as the Warrantors are aware, there are no claims or
                  actions (whether criminal or civil) pending or threatened or
                  anticipated by or against the Company or any of its directors,
                  employees or consultants in relation to the Company or its
                  business or in respect whereof the Company is liable to
                  indemnify any party concerned or may be vicariously liable.
                  19.2 So far as the Warrantors are aware, there are no
                  investigations, disciplinary proceedings or other material
                  facts or circumstances likely to lead to any claim, action,
                  proceeding, suit, litigation, prosecution, investigation,
                  enquiry or arbitration involving the Company.
         20.      Insurance
                  20.1 The Company and its assets are insured against such risks
                  and in such sums as are disclosed in the Warrantors'
                  Disclosure Letter and, so far as the Warrantors are aware,
                  none of the transactions contemplated by this agreement will
                  directly or indirectly alter, invalidate or otherwise affect
                  such insurance. All premiums due in respect of such insurance
                  have been fully paid; and the next renewal date for each of
                  such insurance is a date at least 30 days after the Completion
                  Date. So far as the Warrantors are aware, all such insurance
                  is currently in full force and effect, and so far as the
                  Warrantors are aware, nothing has been done or omitted to be
                  done which could make any policy of insurance void or
                  voidable.
                  20.2 So far as the Warrantors are aware, no claim is
                  outstanding or is likely to be made under any of such
                  insurance and so far as the Warrantors are aware no
                  circumstances exist which are likely to give rise to any such
                  claim.
                  20.3 So far as the Warrantors are aware, there are no claims
                  capable of arising against the Company by an employee, a
                  ▇▇▇▇▇▇▇ or any other third party, in respect of any accident
                  or injury, which do not fall within the insurances effected by
                  the Company.
                                      -65-
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                                     PART C
                      PROPERTY AND ENVIRONMENTAL WARRANTIES
         1. The Company has no legal or beneficial interest in any property or
         premises.
         2. So far as the Warrantors are aware no Hazardous Materials have
         migrated from the premises occupied by the Company onto or beneath
         other properties or are likely to do so.
         3. The Company has not illegally managed or illegally allowed to escape
         from its control or transferred to an unauthorised person in breach of
         the Environmental Protection Act 1990 any controlled waste as defined
         in the said Act.
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                                     PART D
                                 TAX WARRANTIES
        1.      Reserve for Taxation in the Accounts
                1.1 The Accounts make adequate reserve or provide for all
                Taxation to the extent required by the Accounting Requirements
                for which the Company was in respect of the period ending on the
                Accounts Date liable and the Accounts make proper reserve for or
                contain a note regarding any contingent liability or possible
                deferred liability to Taxation to the extent required by the
                Accounting Requirements.
        2.      Returns and Payment of Taxation
                2.1 Other than in respect of VAT which is dealt with in clause
                14 below all returns, computations and notices or information
                which should have been made by law by the Company for the
                purposes of Taxation in respect of any accounting period up to
                the Accounts Date (i) have been made punctually and are correct
                in all material respects, (ii) contain all information required
                by law for all the purposes of Taxation and (iii) are not the
                subject of any dispute with the Inland Revenue or H M Customs &
                Excise or the Department of Employment or other relevant or
                appropriate authority as of the Completion Date; and the Company
                is not involved in any material dispute with the Inland Revenue
                or other relevant or appropriate authority concerning any matter
                likely to affect in any way the liability (whether accrued,
                contingent or future) of the Company to Taxation and is under no
                liability to pay any penalty or interest in connection with any
                claim for Taxation.
                2.2 No corporation taxation computations of the profits and
                losses of the Company and of its liability to such Taxation for
                the accounting periods ending since the Company's inception have
                not been agreed with the Inland Revenue or other appropriate
                authority.
                2.3 Other than in respect of VAT which is dealt with in clause
                14 below the Company has duly and punctually paid to the Inland
                Revenue or other appropriate authority all Taxation (if any) for
                which it is legally liable as a result of any act or omission of
                the Company prior to the Completion.
                2.4 Other than in respect of VAT which is dealt with in clause
                14 below the Company has duly and punctually deducted, withheld,
                or collected for payment (as appropriate) all Taxation (if any)
                which it has become legally liable to deduct, withhold or
                collect for payment and has paid all such Taxation to the Inland
                Revenue or other appropriate authority.
                2.5 There are set out in the Warrantors' Disclosure Letter
                particulars of all notifications and notices received by the
                Company under section 166 of ICTA.
                                      -67-
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                2.6 No material failures have occurred in operating the PAYE and
                National Insurance Contributions systems and the Company has
                kept and maintained records which are correct and up-to-date in
                all material respects for the purposes of the legislation
                relating thereto.
                2.7 The Company has not, since its inception, paid or become
                liable to pay any fine, penalty or interest charged by virtue of
                the provisions of the Taxes Management Act of 1970 or similar
                provisions in other countries.
                2.8 The Company has not, since its inception, been the subject
                of a PAYE audit and no formal notification has been received
                from the Inland Revenue that an investigation by the Inland
                Revenue is underway.
                2.9 Other than in respect of VAT which is dealt with in clause
                14 below, no transaction has been entered into by the Company
                since the Accounts Date in respect of which the Company is
                required to make a specific return or to provide information to
                a relevant Taxation Authority and in respect of which the time
                for making such return or providing such information will expire
                on or after the Completion.
        3.      Tax Clearances
                3.1 Since the date of inception of the Company, no transaction
                has been entered into by the Company in respect of which any
                consent or clearance from the Inland Revenue or other
                appropriate Taxation or governmental authority was required.
        4.      Base Values and Acquisition Costs
                4.1 Save as disclosed in the Warrantors' Disclosure Letter the
                aggregate book value (exclusive of any value attributable to an
                asset in excess of its cost) of each of the assets of the
                Company in or adopted for the purposes of the Accounts does not
                exceed the aggregate written-down value of such asset for the
                purposes of CAA.
                4.2 Save as disclosed in the Warrantors' Disclosure Letter if
                each of the capital assets of the Company (excluding, for the
                avoidance of doubt, trading stock) were disposed of for a
                consideration equal to the book value of that asset in, or
                adopted for the purposes of, the Accounts, no liability to
                corporation tax on chargeable gains or balancing charge would
                arise.
                4.3 The Company does not own and has not agreed to acquire or
                dispose of any asset, nor has it received or agreed to receive
                any services or facilities (including without limitation the
                benefit of any licenses or agreements), the consideration for
                the acquisition or provision of which was or will be in excess
                of its market value or otherwise than on an arm's length basis.
                                      -68-
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        5.      Distributions and Payments
                5.1 No security issued by the Company and remaining in issue as
                of the Completion was issued in such circumstances that the
                interest payable thereon falls to be treated as a distribution
                under section 209 of ICTA or section 418 of ICTA.
                5.2 The Company has not, since its inception, repaid, or agreed
                to repay, or redeemed, or agreed to redeem, or purchased or
                agreed to purchase any of its share capital, or capitalised or
                agreed to capitalise, in the form of debentures or redeemable
                shares, any profits or reserves of any class or description;
                5.3 The Company has not issued any share capital to which the
                provisions of section 249 of ICTA could apply nor does it own
                any such share capital.
        6.      Taxation Claims, Liabilities and Reliefs
                6.1 There are set out in the Warrantors' Disclosure Letter
                material details of all matters relating to Taxation in respect
                of which the Company (either alone or jointly with any other
                person) at the Completion will have, on the basis of current law
                and practice as at the Completion Date an outstanding
                entitlement:
                        (a) to make any claim for relief under ICTA or any other
                        statute relating to Taxation;
                        (b) to make any election for one type of relief, on one
                        basis, system or method of Taxation, as opposed to
                        another;
                        (c) to make an appeal (including a further appeal)
                        against an assessment to Taxation;
                        (d) to make an application for the postponement of, or
                        the payment by instalments of, any Taxation; or
                        (e) to disclaim or require the postponement of any
                        allowance or relief.
                6.2 The Company is not, nor will it become, liable to pay, or
                make any reimbursement or give any indemnity in respect of, any
                Taxation (or any amounts corresponding thereto) in consequence
                of the failure of any person to discharge that Taxation within
                any specified period, where such Taxation relates to a profit,
                income or gain, transaction, event, omission or circumstance
                arising, occurring or deemed to arise or occur (whether wholly
                or partly) prior to the Completion.
        7.      Tax Residence and Status
                                      -69-
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                7.1 The Company has been resident for tax purposes in the United
                Kingdom at all times since its incorporation and the Company has
                never been resident in any other jurisdiction.
                7.2 The Company has not at any time been a trustee of any
                settlement for the purposes of Section 260 of TCGA.
        8.      Disallowance of Deductions
        No rents, interest, annual payments, emoluments, management or service
        fees or charges or other sums of an income nature (including benefits in
        kind) paid or provided by the Company since the Accounts Date or which
        the Company is under an obligation to pay or provide in the future are
        or may under the law currently in force be wholly or partially
        disallowable as deductions or charges in computing profits or against
        profits for the purposes of corporation tax by reason of any statutory
        provision relating to Taxation.
        9.      Corporation Tax on Chargeable Gains
                9.1 Neither the signing of this agreement nor Completion will
                result in any profit or gain being deemed to accrue to the
                Company for the purposes of Taxation whether pursuant to section
                179 of TCGA or otherwise.
                9.2 The Company has not disposed of or acquired any asset in
                such circumstances that the provisions of section 17 of TCGA did
                or could apply thereto.
                9.3 No Taxation is or may become payable by the Company pursuant
                to section 189 or 190 of TCGA in respect of any transaction or
                event occurring on or prior to the Completion.
                9.4 The Company has not at any time made any claim under
                sections 152 to 156 or 175 or 247 of TCGA or under any other
                analogous provision under UK Taxation legislation which could
                affect the amount of any gain accruing or treated as accruing on
                a disposal of any asset by the Company; and no claim has been
                made by the Company or, so far as the Warrantors are aware, is
                capable of being made by any other company which affects or
                could affect the amount or value of the consideration for the
                acquisition of any asset by the Company which is to be taken
                into account in calculating any gain on subsequent disposal.
                9.5 The Company has not made any claim under any of the
                following:
                        (a) section 279 of TCGA (assets situated outside the
                        United Kingdom);
                        (b) sections 48 or 280 of TCGA (tax on chargeable gains
                        payable by instalments);
                                      -70-
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                        (c) section 24 of TCGA (assets of negligible value).
                9.6 The Company is not liable to be assessed to corporation tax
                on chargeable gains or to capital transfer tax or inheritance
                tax as donor or donee of any gift or transferor or transferee of
                value.
                9.7 In the period from the last Accounts Date to Completion,
                there has not accrued any gain in respect of which the Company
                may be liable to corporation tax on chargeable gains by virtue
                of the provisions of section 13 of TCGA.
                9.8 No consideration due to the Company after disposal has, so
                far as the Warrantors are aware, become irrecoverable within the
                meaning of section 48 of TCGA so as to entitle the Company to an
                adjustment.
        10.     Close Companies
                10.1 No distribution within section 418 of ICTA, so far as the
                Warrantors are aware, has ever been made by the Company, and no
                such distribution will be made prior to the Completion.
                10.2 No loan or advance within sections 419 to 422 (inclusive)
                of ICTA has ever been made by the Company.
        11.     Inheritance Tax
                11.1 The Company has not made any transfers of value for the
                purposes of section 94 of IHTA.
                11.2 The Company has not been a party to associated operations
                in relation to a transfer of value within the meaning of section
                268 of IHTA.
                11.3 No asset owned by, or shares or securities in, the Company
                is liable to be subject to any sale, mortgage or charge by
                virtue of section 212 of IHTA.
                11.4 There is not outstanding any Inland Revenue charge (as
                defined in section 237 of IHTA) over any asset of the Company or
                in relation to any shares in the capital of the Company.
        12.     Tax Avoidance
                12.1 The Company has not entered into or been party to any
                transaction, scheme or arrangement designed wholly or partly for
                the purpose of avoiding Taxation, which may result in a
                liability to Taxation on the Company pursuant to any of the
                following sections, namely sections 56, 56A, 116, 395 and 399;
                sections 703-746 (inclusive); section 767A; section 770;
                sections 774, 775 and 776, all ICTA;
                                      -71-
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                section 106 of TCGA; sections 29 and 30 of TCGA; sections 61, 75
                and 142 of CAA.
                12.2 The Company has not received any formal notification from
                the Inland Revenue or its equivalent in other countries that it
                has commenced a formal investigation in respect of any
                transactions or arrangements involving the Company with a view
                to applying section 770 of ICTA, or equivalent legislation in
                other countries.
                12.3 The Company has not entered as lessor into any leasing
                transactions in respect of which capital allowances may be
                restricted or disallowed under section 22 or 47 of CAA.
                12.4 The Company has not without the prior consent of the
                Treasury entered into any of the transactions specified in
                sections 765 to 767 (inclusive) of ICTA.
        13.     Miscellaneous
                13.1 The Company has not entered into any loan relationship
                which is for an unallowable purpose as described in paragraph 13
                of schedule 9 to the Finance ▇▇▇ ▇▇▇▇.
                13.2 The Company has not entered into any loan relationships or
                related transactions which are not at arm's length for the
                purposes of paragraph 11 of schedule 9 to the Finance ▇▇▇ ▇▇▇▇.
                13.3 The Company has not entered into any loan relationship with
                a connected person such that section 87 of the Finance ▇▇▇ ▇▇▇▇
                could apply to that relationship and the Company has complied
                with all relevant provisions contained in Chapter II of Part IV
                of the Finance ▇▇▇ ▇▇▇▇ in respect of any loan relationships to
                which the Company is a party.
                13.4 No loan relationship to which the Company is a party is a
                convertible security for the purposes of section 92 of the
                Finance ▇▇▇ ▇▇▇▇ or linked to the value of chargeable assets for
                the purposes of section 93 of the Finance ▇▇▇ ▇▇▇▇.
                13.5 The Company has made no claim in respect of bad debts for
                the purposes of paragraph 5 of schedule 9 to the Finance ▇▇▇
                ▇▇▇▇.
                13.6 The Company has not capitalised any debit in respect of a
                loan relationship in its accounts other than in relation to a
                fixed capital asset or project as referred to in paragraph 14 of
                schedule 9 to the Finance ▇▇▇ ▇▇▇▇.
        14.     Value Added Tax
                14.1 The Company:
                                      -72-
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                        (a) is duly registered for the purposes of VAT and has
                        been so registered at all times when it has been legally
                        required to be registered by the relevant legislation;
                        (b) has complied in all material respects with all
                        statutory requirements, orders, provisions, directions
                        or conditions relating to VAT, including (for the
                        avoidance of doubt) the terms of any agreement reached
                        with HM Customs and Excise;
                        (c) maintains and has at all times maintained records
                        which are correct and up-to-date in all material
                        respects for the purposes of the legislation relating to
                        VAT and has preserved such records materially in such
                        form and for such periods as are required by such
                        legislation;
                        (d) is not in arrears with any payment or returns
                        required under any legislation relating to VAT, or
                        legally liable to any abnormal or non-routine payment,
                        or any forfeiture or penalty or fine or default
                        surcharge, or to the operation of any penal provision
                        relating to VAT or to pay any interest or fine as a
                        result of making late VAT returns; and
                        (e) has not been required by Customs and Excise to give
                        security.
                14.2 The Company has not at any time been legally regarded as a
                member of a group of companies for VAT purposes and no
                application for it to be so treated has at any time been made.
                14.3 So far as the Warrantors are aware, no act or transaction
                has been effected in consequence whereof the Company is or may
                be held legally liable for any VAT chargeable against any other
                company; and the Company is not, and has not agreed to become an
                agent, manager or factor for the purposes of section 47 of VATA
                of any person who is not resident in the United Kingdom.
                14.4 All supplies made by the Company are taxable supplies and
                the Company is not and, so far as the Warrantors are aware, will
                not be denied credit for any input tax by reason of the
                operation of any provisions of VATA and the regulations made
                thereunder; and all input tax for which the Company has claimed
                credit has been or will be paid by the Company timeously in
                respect of supplies made to it relating to goods or services
                used or to be used for the purpose of the Company's business.
                14.5 No supplies have been made to the Company to which the
                provisions of section 8 to VATA might apply.
                                      -73-
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                14.6 No claims have been made by the Company since its inception
                in respect of which a refund of VAT has been received by the
                Company under section 36 of VATA.
                14.7 The Company does not have an interest in any land in
                relation to which an election has been made either by the
                Company or by any other person to an exemption from VAT pursuant
                to the provisions of schedule 10 of VATA.
                14.8 The Company does not use in the course or furtherance of
                its business any item to which Part XV of the VAT Regulations
                1995 applies and in respect of which the period of adjustment
                will not have expired on or before the Completion.
                14.9 With regard to VAT, no transaction has been entered into by
                the Company since the Accounts Date in respect of which the
                Company is required to make a specific return or to provide
                information to a relevant Taxation Authority and in respect of
                which the time for making such return or providing such
                information will expire on or after the Completion.
                14.10 With regard to VAT, the returns submitted by the Company
                are not the subject of any dispute with HM Customs & Excise or
                other relevant or appropriate authority as of the Completion
                Date and the Company is not involved in any material dispute
                with HM Customs & Excise or other relevant or appropriate
                authority concerning any matter likely to affect in any way the
                liability (whether accrued, contingent or future) of the Company
                to account for VAT and is under no liability to pay any penalty
                or interest in connection with any claim for VAT.
        15.     Pension Schemes
        The Company has not since the Accounts Date received any payment to
        which section 601 of ICTA applies.
        16.     Share Schemes
                16.1 The Company is not a participating company in any scheme
                approved under section 185 or 186 of ICTA.
                16.2 The Company has not established or contributed to a
                qualifying employees share ownership trust as defined in
                schedule 5 of the Finance ▇▇▇ ▇▇▇▇.
        17.     Capital Allowances
                17.1 The Company has not since the Accounts Date done or omitted
                to do, or agreed to do or permitted to be done, any act (other
                than the sale of an asset at a price equal to its market value),
                nor has the Company suffered any occurrence, as a result of
                which any disposal value has been or may be required to be
                brought into 
                                      -74-
   77
                account under section 24 of CAA, nor has there been, nor may
                there be, any recovery from the Company of excess relief within
                section 42 or 47 of CAA.
                17.2 Since the Accounts Date the Company has not done, nor has
                it omitted to do, nor agreed to do, nor permitted to be done,
                any act, nor, so far as the Warrantors are aware, has it
                suffered any occurrence, as a result of which any balancing
                charge has arisen or may arise under section 4 of CAA.
                17.3 The Company has not made any election under section 37 of
                CAA or engaged in any short-term leasing within section 40 of
                CAA.
                17.4 The Company has not taken or granted a lease of any assets
                in respect of which an election has been made under section 53
                or 55 of CAA.
        18.     Stamp Duty and Stamp Duty Reserve Tax
                18.1 The Company has duly paid all stamp duty and all stamp duty
                reserve tax for which it has at any time been legally liable,
                and all documents which require to be stamped and which form
                part of the Company's title to any asset or which the Company
                may need to produce in court in evidence have been duly stamped.
                18.2 Since inception, the Company has not made any claim for
                relief or exemption under section 42 of the 1930 Act or sections
                75 to 77 of the 1986 Act.
        19.     General
                19.1 No act or transaction has been effected to which the
                Company is a party in consequence whereof the Company has is or
                may be held legally liable for any Taxation primarily chargeable
                against some other person.
                19.2 The Company does not operate any scheme approved under
                section 202 of ICTA (payroll deduction scheme in respect of
                donations to charity) or under sections 169 to 184 of ICTA
                (profit related pay).
                                      -75-
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                                   SCHEDULE 5
                            CONDITIONS TO COMPLETION
1. The respective obligations under this agreement of each party hereto shall be
subject to the satisfaction on or prior to Completion of each of the following
conditions, any of which may be waived, in writing, by agreement of all the
parties:
        (a) No temporary restraining order, preliminary or permanent injunction
        or other order issued by any court of competent jurisdiction or other
        legal or regulatory restraint or prohibition preventing the consummation
        of the transactions contemplated hereby shall be in effect, nor shall
        any proceeding brought by an administrative agency or commission or
        other governmental authority or instrumentality, domestic or foreign,
        seeking any of the foregoing be pending; nor shall there be any action
        taken, or any statute, rule, regulation or order enacted, entered,
        enforced or deemed applicable to the transactions contemplated hereby,
        which makes the consummation of such transactions illegal.
        (b) The Purchaser, the Company and the Vendors shall have timely
        obtained from each Governmental Entity all approvals, waivers,
        clearances and consents, if any, necessary for consummation of or in
        connection with the transactions contemplated hereby, including, without
        limitation, such approvals, waivers and consents as may be required from
        the Biotechnology and Biological Sciences Research Council and Ministry
        of Agricultural, Fisheries and Food, and under the Securities Act and
        under any state securities laws.
        (c) The relevant Vendors shall have received a letter dated prior to
        Completion, from HM Inland Revenue, giving clearance for the
        transactions contemplated by this agreement pursuant to Section 138 of
        the TCGA and Section 707 of the ICTA.
        (d) The boards of directors of the Purchaser and the Company shall have
        approved the transactions contemplated herein.
        (e) That 3i's payment of L 2,000,000 for D ordinary shares in the
        Company is received by the Company's Solicitors and is in cleared funds.
        (f) That the Purchaser receives confirmation from 3i and Roslin
        Institute that there are no outstanding sums owed to each or any of them
        by the Company.
                                      -76-
   79
        (g) That the sum of L 26,000 has been paid by the Company to 3i.
2. The obligations of the Vendors under this agreement shall be subject to the
satisfaction at or prior to Completion of each of the following conditions, any
of which may be waived, in writing, by the Warrantors' Representative and 3i:
        (a) The Vendors shall have been provided with a certificate executed by
        the secretary or assistant secretary of the Purchaser certifying:
                (i) resolutions duly adopted by the board of directors of the
                Purchaser authorising the execution of this agreement and the
                execution, performance and delivery of all agreements, documents
                and transactions contemplated hereby; and
                (ii) the incumbency of the officers of the Purchaser executing
                this agreement and all agreements and documents contemplated
                hereby.
        (b) The Company shall have received a certificate or certificates of the
        Secretary of State of the State of Delaware and any applicable franchise
        tax authority of such state, certifying as of a date no greater than
        three business days prior Completion that Purchaser has filed all
        required reports, paid all required fees and taxes and is, as of such
        date, in good standing and authorised to transact business as a domestic
        corporation.
3. 
        (a) The Purchaser shall have been provided with a certificate executed
        by the Secretary of the Company certifying:
                (i) resolutions duly adopted by the board of directors and where
                relevant the Vendors of the Company authorising the execution of
                this agreement and the execution, performance and delivery of
                all agreements, documents and transactions contemplated hereby;
                (ii) the memorandum and articles of association of the Company,
                as in effect immediately prior to Completion, including all
                amendments thereto; and
                (iii) the incumbency of the officers of the Company executing
                all agreements and documents contemplated hereby to be executed
                by the Company.
                                      -77-
   80
        (b) The Company shall have taken or caused to be taken such action as
        may be required under each outstanding option to enable the Purchaser to
        acquire shares in the Company granted to employees or consultants of the
        Company under any share option of the Company (each a "Company Option")
        and to cause each holder of a Company Option to enter into an Option
        Exchange Agreement.
        (c) The Purchaser shall have received an opinion from its financial
        advisor, ▇. ▇. ▇▇▇▇▇▇, stating that in the opinion of such financial
        advisor, the terms of the transactions contemplated hereby are fair to
        the stockholders of the Purchaser from a financial point of view.
                                      -78-
   81
                                   SCHEDULE 6
                 REPRESENTATIONS AND WARRANTIES OF THE PURCHASER
Except as disclosed in the Purchaser's Disclosure Letter, the Purchaser hereby
represents and warrants to the Vendors as follows:
        (a) The Purchaser is a corporation duly organised, validly existing and
        in good standing under the laws of its jurisdiction of organisation. The
        Purchaser has the corporate power to own its properties and to carry on
        its business as now being conducted and as proposed to be conducted and
        is duly qualified to do business and is in good standing in each
        jurisdiction in which the failure to be so qualified and in good
        standing would have a Material Adverse Effect on the Purchaser. The
        Purchaser does not have any subsidiaries or ownership interest in any
        other person including, for the avoidance of doubt, any company or
        corporation.
        (b) The authorised, issued and outstanding capital stock of Purchaser is
        as set forth on the Purchaser's Disclosure Letter. Other than as set
        forth in the Purchaser's Disclosure Letter and as contemplated under
        this Agreement, there are no other outstanding shares of capital stock
        or voting securities of Purchaser, and there are no other options,
        warrants, calls, rights, commitments or agreements of any character to
        which Purchaser is a party or by which it is bound obligating the
        Purchaser to issue, deliver, sell, repurchase or redeem, or cause to be
        issued, delivered, sold, repurchased or redeemed, any shares of the
        capital stock of the Purchaser or obligating the Purchaser to grant,
        extend or enter into any such option, warrant, call right, commitment or
        agreement. All of the issued and outstanding shares of capital stock of
        the Purchaser are duly authorised, validly issued, fully paid,
        non-assessable and free of pre-emptive rights or option. The
        Consideration Shares when issued pursuant to this agreement will be duly
        authorised, validly issued, fully paid, non-assessable and free of
        pre-emptive rights or options.
        (c)The Purchaser has all requisite legal and corporate power and
        authority to enter into this agreement and to consummate the
        transactions contemplated hereby. The execution and delivery of this
        agreement and the consummation of the transactions contemplated hereby
        have been duly authorised by all necessary corporate action on the part
        of the Purchaser. This agreement has been duly executed and delivered by
        the Purchaser and constitutes the valid and binding obligation of the
        Purchaser enforceable against the Purchaser in accordance with its
        terms. 
(d)
                                      -79-
   82
                (i) The execution and delivery of this agreement do not, and the
                consummation of the transactions contemplated hereby will not,
                conflict with, or result in any violation of, or default under
                (with or without notice or lapse of time, or both), or give rise
                to a right of termination, cancellation or acceleration of any
                obligation or loss of a benefit under (i) any provision of the
                Certificate of Incorporation or Bylaws of the Purchaser, as
                amended, or (ii) any material mortgage, indenture, lease,
                contract or other agreement or instrument, permit, concession,
                franchise, license, judgement, order, decree, statute, law,
                ordinance, rule or regulation applicable to the Purchaser or its
                properties or assets.
                (ii) No consent, approval, order or authorisation of, or
                registration, declaration or filing with, any Governmental
                Entity, is required by or with respect to the Purchaser in
                connection with the execution and delivery of this agreement by
                the Purchaser or the consummation by the Purchaser of the
                transactions contemplated hereby, except for (i) the filing of a
                Form 8-K with the Securities and Exchange Commission ("SEC") and
                National Association of Securities Dealers ("NASD") within 15
                days after Completion, (ii) any filings as may be required under
                applicable state securities laws and the securities laws of any
                foreign country, (iii) the filing with the Nasdaq National
                Market of a Notification Form for Listing of Additional Shares
                with respect to the Consideration Shares issuable pursuant to
                this agreement and (iv) consents, authorisations, filings,
                approvals and registrations which, if not obtained or made,
                would not have a Material Adverse Effect on the Purchaser and
                would not prevent, materially alter or delay any of the
                transactions contemplated by this agreement.
        (e)
                (i) The Purchaser has filed all forms, reports and documents
                required to be filed by the Purchaser with the SEC since July
                30, 1996, and heretofore has made available to counsel for the
                Vendors copies, in the form filed with the SEC, of (i) its
                Annual Report on Form 10-K for the fiscal years ended December
                31, 1996, 1997 and 1998, its Quarterly Reports on Form 10-Q for
                the periods ended March 31, 1998, June 30, 1998 and September
                30, 1998, (iii) all definitive proxy statements relating to
                Purchaser's meetings of stockholders (whether annual or special)
                held since July 30, 1996 and (iv) all other forms, reports and
                registration statements (other than Quarterly Reports on Form
                10-Q not referred to in clause (ii) above and excluding exhibits
                to registration statements and materials relating to stock
                option and compensation plans)
                                      -80-
   83
                filed with the SEC by the Purchaser since June 30, 1996 and
                prior to the date hereof (collectively, the "Purchaser SEC
                Documents"). As of their respective filing dates, the Purchaser
                SEC Documents complied in all material respects with the
                requirements of the Securities Exchange Act of 1934, as amended
                (the "Exchange Act") and the Securities Act, and none of the
                Purchaser SEC Documents contained any untrue statement of a
                material fact or omitted to state a material fact required to be
                stated therein or necessary to make the statements made therein,
                in light of the circumstances in which they were made, not
                misleading, except to the extent corrected by a subsequent
                Purchaser SEC Document filed prior to the date of this
                agreement.
                (ii) The financial statements of Purchaser, including the notes
                thereto, included in the Purchaser SEC Documents (the "Purchaser
                Financial Statements") were complete and correct in all material
                respects as of their respective filing dates, complied as to
                form in all material respects with applicable accounting
                requirements and with the published rules and regulations of the
                SEC with respect thereto as of their respective dates, and have
                been prepared in accordance with generally accepted accounting
                principles applied on a basis consistent throughout the periods
                indicated and consistent with each other (except as may be
                indicated in the notes thereto or, in the case of unaudited
                statements, included in Quarterly Reports on Forms 10-Q). The
                Purchaser Financial Statements fairly present the consolidated
                financial condition and operating results of Purchaser and its
                subsidiaries at the dates and during the periods indicated
                therein (subject, in the case of unaudited statements, to
                normal, recurring year-end adjustments). There has been no
                change in Purchaser accounting policies except as described in
                the notes to the Purchaser Financial Statements.
        (f) Since December 31, 1998 (the "Purchaser Balance Sheet Date"), the
        Purchaser has conducted its business in the ordinary course in a manner
        consistent with past practice and there has not occurred: (i) any
        change, event or condition (whether or not covered by insurance) that
        has resulted in, or might reasonably be expected to result in, a
        Material Adverse Effect to the Purchaser; (ii) any declaration, setting
        aside, or payment of a dividend or other distribution with respect to
        the shares of the Purchaser, or any direct or indirect redemption,
        purchase or other acquisition by Purchaser of any of its shares of
        capital stock; (iii) any material amendment or change to the Purchaser's
        Certificate of Incorporation or Bylaws; or (iv) any negotiation or
        agreement by the Purchaser to do any of the things described in the
        preceding clauses (i) through (iii) (other than negotiations with the
        Company, the Vendors and
                                      -81-
   84
        their representatives regarding the transactions contemplated by this
        agreement).
        (g) There is no private or governmental action, suit, proceeding, claim,
        arbitration or investigation pending before any agency, court or
        tribunal, foreign or domestic, or, to the knowledge of the Purchaser,
        threatened against the Purchaser or any of its properties or any of its
        officers or directors (in their capacities as such) that, individually
        or in the aggregate, could reasonably be expected to have a Material
        Adverse Effect on the Purchaser. There is no judgement, decree or order
        against the Purchaser or, to the knowledge of the Purchaser, any of its
        directors or officers (in their capacities as such) that could prevent,
        enjoin, or materially alter or delay any of the transactions
        contemplated by this agreement, or that could reasonably be expected to
        have a Material Adverse Effect on the Purchaser.
        (h) The Purchaser has obtained each federal, state, county, local or
        foreign governmental consent, license, permit, grant, or other
        authorisation of a Governmental Entity that is required for the
        operation of the Purchaser's business ("Purchaser Authorisations"), and
        all of such Purchaser Authorisations are in full force and effect,
        except where the failure to obtain or have any of such Purchaser
        Authorisations could not reasonably be expected to have a Material
        Adverse Effect on the Purchaser.
        (i) The Purchaser is purchasing the Sale Shares as principal and not as
        a nominee or agent on behalf of any other person.
        (j) The Purchaser acknowledges, without making any warranty or
        representation to the Warrantors that, as at the date of this agreement
        and except as set forth in the Warrantors' Disclosure Letter, there are
        no facts, matters or circumstances known to the Purchaser which would
        constitute a breach of the Warranties and accordingly is not entering
        into this agreement with a view to making any claim under the Warranties
        on the basis of the facts, matters and circumstances known to it.
        (k) The facts set out in the specific disclosures set out in the
        Purchaser's Disclosure Letter are true and accurate in all material
        respects.
                                      -82-
   85
SIGNED by SIMON BEST in the        )
presence of:                       )
SIGNED by ▇▇▇▇ ▇▇▇▇▇ in the        )
presence of:                       )
SIGNED by ▇▇▇ ▇▇▇▇ in the          )
presence of:                       )
SIGNED by ▇▇▇ ▇▇▇▇▇ in the         )
presence of:                       )
SIGNED by ▇▇▇ ▇▇▇▇▇▇ in the        )
presence of:                       )
SIGNED by                          )
for and on behalf of GERON         )
CORPORATION in the presence of:    )
SIGNED by                          )
for and on behalf of ROSLIN        )
INSTITUTE in the presence of:      )
[Roslin to confirm method of signing]
SIGNED by                          )
for and on behalf of 3I GROUP PLC  )
 in the presence of:               )
                                      -83-
   86
                                     ANNEX A
                             Unregistered Trademarks
                                      -84-