EXECUTION VERSION DATED 16 July 2025 SEVERN TRENT Plc(as Issuer) andSEVERN TRENT UTILITIES FINANCE Plc(as Issuer) andSEVERN TRENT WATER LIMITED(as Guarantor in respect of Notes issued by Severn Trent Utilities Finance Plc) andTHE LAW DEBENTURE TRUST...Fifteenth Supplemental Trust Deed • July 15th, 2025
If, as at any relevant SOFR Determination Time, the relevant SOFR Index is not published or displayed on the SOFR Administrator's Website by the SOFR Administrator, the Compounded SOFR for the applicable Interest Accrual Period for which the relevant SOFR Index is not available shall be "Compounded Daily SOFR" determined in accordance with Condition 4(b)(ii)(D) above as if "Index Determination" were specified in the applicable Final Terms as being 'Not Applicable', and for these purposes: (i) the "Observation Method" shall be deemed to be "Observation Shift" and (ii) the "Observation Shift Period" shall be