Liquidity Extension Update

Thames Water Utilities Limited

12 February 2026

Liquidity Extension Update relating to Additional Super Senior Issuer Funding

Background

Thames Water Utilities Limited ("TWUL") has so far drawn £1.426bn of the initial £1.5bn available under the super senior liquidity facility (the "Facility") entered into with its subsidiary, Thames Water Super Senior Issuer plc (the "Super Senior Issuer") in 2025.

In addition, TWUL and the Super Senior Issuer have the ability to raise a further £1.5bn in two tranches of £750m (augmented by any commitments under the Facility which are undrawn as a result of being deferred pursuant to the terms of the Second Consent Request[1] (the "Deferred Commitments")) (the "Accordion"), subject to satisfaction and/waiver of relevant conditions precedent. These include, amongst other things, that a supported lock-up agreement ("Supported LUA") is in place in respect of a second restructuring plan ("RP2") and that the CMA Reference Decision Condition[2] is satisfied.

TWUL continues to work closely with stakeholders to secure a market led solution, and following consultation with its creditors, hereby announces that the Super Senior Issuer will today launch a process to allocate c.£823m (the "Accordion Amount") comprising (i) commitments to the first £750m tranche of the Accordion; and (ii) Deferred Commitments and commitments which belong to Defaulting SSIS Creditors totalling c. £73m (the "Accordion Allocation Process").

The launch of the Accordion Allocation Process is the start of an administrative process to allocate the Accordion Amount only. Funding of the Accordion Amount remains subject to the satisfaction and/or waiver of relevant conditions precedent, some of which, as at today, have not yet been satisfied and/or waived in full and remain out of the Super Senior Issuer's control, including having a Supported LUA in respect of RP2.

Terms used but not otherwise defined have the meanings given to them in the Accordion Funding Letter (as defined below).

Accordion Allocation Process

Creditors who wish to participate in the Accordion Allocation Process are encouraged to review and complete the funding letter (the "Accordion Funding Letter") which will shortly be made available (together with other documents related to the Accordion Allocation Process) by Kroll Issuer Services Limited (the "Information Agent") at https://deals.is.kroll.com/thameswater-accordion.

The Accordion Funding Letter contains further details as to (i) creditors' entitlements to participate in the Accordion Allocation Process; (ii) how creditors can elect to participate in the Accordion Allocation Process; and (iii) how Accordion commitments will be allocated by the Super Senior Issuer.

An Eligible Additional Super Senior Funding Participant who elects to provide Accordion funding may still be allocated zero Accordion funding commitments if the entire available Accordion funding is taken up by Eligible Additional Super Senior Funding Participants who have a prior allocation right (in accordance with the terms of the Super Senior Issuer Intercreditor Agreement).

The Accordion Allocation Process has an election deadline of 5:00 p.m. (UK time) on 26 February 2026 by which time creditors must have submitted a completed Accordion Funding Letter and provided all required information, confirmations and documents in order to participate in the Accordion Allocation Process. Creditors should contact the Information Agent at [email protected] with questions on how to complete and submit the Accordion Funding Letter.

STAKEHOLDERS ARE ENCOURAGED TO REVIEW THE ACCORDION ALLOCATION PROCESS DOCUMENTS IN DETAIL THEMSELVES (COPIES OF WHICH ARE AVAILABLE AT HTTPS://DEALS.IS.KROLL.COM/THAMESWATER-ACCORDION) AND SEEK THEIR OWN LEGAL AND FINANCIAL ADVICE[3] SHOULD THEY HAVE ANY QUERIES IN RELATION TO THEIR CONTENTS.

For further information

Investor enquiries

Fred Maroudas - Director of Corporate Finance [email protected]

Media enquiries

Suvra Jans - Head of Media Relations 07747 640810

[email protected]

Alex Simmons [email protected]

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