United Utilities PLC to delist from the New York Stock Exchange

25 June 2007

United Utilities has today filed form to terminate its registration under the US Exchange Act

UU TO DELIST FROM NEW YORK STOCK EXCHANGE                  

Warrington - June 25, 2007 - United Utilities PLC (NYSE : 'UU') announces
today that it has filed with the U.S. Securities and Exchange Commission the
requisite form to terminate its registration under the U.S. Securities Exchange
Act of 1934. UU had previously filed to withdraw its American depositary shares
(CUSIP: US913111Q1058)(the 'ADSs') and its ordinary shares (the 'Shares') from
listing on the New York Stock Exchange ('NYSE') and registration under Section
12(b) of the Exchange Act.

The Company is chosing to delist its ADSs and Shares and deregister due to the
low number of outstanding ADSs, the fact that the ADSs are not widely held in
the United States and the low trading volume in its ADSs. Due to the foregoing,
the Company also believes that the administrative costs of maintaining the
listing and costs of complying with U.S. federal securities laws are no longer
justified. Subsequent to such delisting and deregistration, the Shares will
continue to be listed on the London Stock Exchange. The ADSs will not be so
listed but will be eligible for trading over-the-counter.

For further information, please contact:

Paul Davies, Acting Company Secretary, tel. + 44 (0) 1925 237071

Darren Jameson, Investor Relations Manager, tel. + 44 (0) 1925 237033