Directorate Change

1 September 2025

UNITED UTILITIES GROUP PLC

Appointment of director

United Utilities Group PLC announces that Marina Wyatt has been appointed as an independent non-executive director with effect from 1 October 2025. On joining the Board, Marina will be appointed as a member of the following Board Committees: Nomination, Audit and Treasury.

United Utilities Chairman, Sir David Higgins said: "We are delighted Marina will be joining the Board. Marina has extensive experience both as an audit chair and as a former FTSE 250 Chief Financial Officer working across multiple sectors including infrastructure, energy, telecoms and media/technology. Her executive career has given her a strong background in major project delivery working with multiple stakeholders including government and regulatory bodies. Marina's non-executive experience has afforded her insight into strategy and governance that, combined with her financial experience, will serve to further strengthen the Board's expertise. I look forward to welcoming Marina to the Board."

Marina retired in 2024 from her most recent executive role as CFO of Associated British Ports, the UK's largest port group which manages 25% of the UK's sea-borne trade through its network of 21 ports, a position held since 2019. Other previous roles include CFO positions at UBM Plc, TomTom NV, Colt Group SA and Group Financial Director of Psion Plc. Marina is a Fellow of the Institute of Chartered Accountants, having qualified and spent her early career with Arthur Andersen.

Marina is currently a non-executive director of Lloyd's Register Group Limited and Chair of the Audit and Risk Committee, a Trustee of Lloyd's Register Foundation and Chair of the Audit, Risk and Investment Committee and a Trustee of The Woodland Trust. She will be appointed as a non-executive director of United Utilities Water Limited with effect from 1 October 2025.

In accordance with UKLR 6.4.8 (1), in 2022 Marina stepped down as Supervisory Board Member of Lucas Bols NV and non-executive director of Renewi plc where she chaired the Audit Committee. There are no further details to disclose under UKLR 6.4.8 (2) to (6) in relation to Marina Wyatt.

United Utilities contacts:

LEI 2138002IEYQAOC88ZJ59

Classification - Directorate change

United Utilities Group's ordinary shares trade on the London Stock Exchange and its ADRs, each equal to two ordinary shares, trade over the counter under the Trading Symbol "UUGRY".