United Utilities Group PLC

Report Publication Announcement • May 25, 2011

Dear Investor

Thank you for electing to receive electronic investor communications and helping United Utilities to communicate in an environmentally sustainable way.

This email is to notify you that the United Utilities Group PLC Annual Report and Financial Statements is now available at HTUannualreport2011.unitedutilities.comUTH

The company's annual general meeting will be held at 11.00am on Friday 22 July 2011 at the Midland Hotel, Peter Street, Manchester M2 3NQ. The notice of annual general meeting and a specimen proxy form, which incorporates a location map of the venue, are available at

HTUunitedutilities.com/AGM2011UTH

The proxy form is a specimen only and cannot be used, either electronically or in paper form. To submit your voting instructions you must contact the custodian of your shares.

Yours sincerely, Simon Gardiner Company secretary

United Utilities Group PLC Registered in England & Wales no. 6559020. Registered office: Haweswater House, Lingley Mere Business Park, Lingley Green Avenue, Great Sankey, Warrington, WA5 3LP. Tel: 01925 237000

This message is sent to the e-mail address registered with Equiniti by the custodian of your shareholding. Equiniti Limited and Equiniti Financial Services Limited Registered Office: Aspect House, Spencer Road, Lancing, West Sussex BN99 6DA.

Equiniti Limited Registered in England and Wales no. 6226088

Equiniti Financial Services Limited Registered in England and Wales no. 6208699 authorised and regulated by the Financial Services Authority.

Please note that no-reply@email.equiniti.com is a no response mailbox. For details on how to contact Equiniti, please go to HTUwww.shareview.co.ukUTH