UNITED UTILITIES PLC                              

                    DIRECTORS' AND PDMR INTERESTS IN SHARES                    

United Utilities PLC ("the Company") announces that it received notification on
21 March 2007 that the Trustee, Hill Samuel ESOP Trustees Limited, purchased
ordinary shares of �1 each on behalf of the following directors and persons
discharging managerial responsibility on 19 March 2007, to be held in
accordance with the rules of the Company's Inland Revenue approved share
incentive plan. The shares were purchased at a price of 728.5 pence per share.

      Director        No. of Shares 
                        purchased   
                                    
PHILIP GREEN                22      
                                    
CHARLES CORNISH             22      
                                    
TIM RAYNER                  21      
                                    
LINDA BOOTH                 21      
                                    
GAYNOR KENYON               22      
                                    
TIM WELLER                  20      

                 _____________________________________________                 

Further information can be obtained from Paul Davies, Assistant Company
Secretary + 44 1 925 237051.

United Utilities' ordinary trade on the London Stock Exchange and its ADRs,
each equal to two ordinary shares, trade on the New York Stock Exchange under
the Trading Symbol "UU".



END
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