External Directorship Amendment

UNITED UTILITIES PLC DR JOHN MCADAM - OTHER DIRECTORSHIP AMENDMENT In accordance with Listing Rule 9.6.14 United Utilities PLC reports the proposed appointment of Dr John McAdam as a Chairman of Rentokil-Initial PLC subject to the approval of the Rentokil-Initial PLC shareholders at its annual general meeting on 14 May 2008. _____________________________________________ Further information can be obtained from Jane Gilmore, Deputy Company Secretary 44 1 925 237052. - United Utilities' ordinary trade on the London Stock Exchange and its ADRs, each equal to two ordinary shares, trade OTC in the USA under the Trading Symbol "UUPLY".