Director/PDMR Shareholding

UNITED UTILITIES PLC

DIRECTORS' AND PDMR INTERESTS IN SHARES

United Utilities PLC ("the Company") announces that it received notification on
20 May 2008 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 May 2008, 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 716.0 pence per share.

    Director/PDMR     No. of Shares 
                        purchased   
                                    
MARTIN BRADBURY             22      
                                    
ALISON CLARKE               22      
                                    
CHARLES CORNISH             21      
                                    
CLIVE ELPHICK               22      
                                    
PHILIP GREEN                21      
                                    
GAYNOR KENYON               20      
                                    
TOM KEEVIL                  21      
                                    
TIM WELLER                  20      

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Further information can be obtained from Jane Gilmore, Deputy Company Secretary
+ 44 (0) 1925 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".