UNITED UTILITIES PLC                             
                                                                              
                                12 APRIL 2005                                 
                                                                              
We received a notification today, from Barclays PLC notifying of its interest 
on 7 April 2005 in 16,835,297 ordinary shares in United Utilities PLC         
amounting to 3.01% of the issued share capital.                               
                                                                              
Registered Holder                      Account Designation           Holding  
                                                                              
Bank of Ireland                                                       77,977  
                                                                              
Barclays Trust Co & Others                                               874  
                                                                              
BARCLAYS TRUST CO AS EXEC/ADM                                          3,695  
                                                                              
Barclays Trust Co DMC69                                                7,000  
                                                                              
Barclays Trust Co NOMS & DYE                                             700  
                                                                              
Barclays Trust Co R69                                                 56,935  
                                                                              
BNP Paribas                                                           52,759  
                                                                              
CHASE NOMINEES LTD                                   16376           319,278  
                                                                              
CHASE NOMINEES LTD                                   20947            74,350  
                                                                              
CHASE NOMINEES LTD                                   21359           255,722  
                                                                              
CIBC Mellon Global Securities                                         26,327  
                                                                              
Clydesdale Nominees HGB0125                         594414             6,500  
                                                                              
Clydesdale Nominees HGB0125                         686408             5,500  
                                                                              
Clydesdale Nominees HGB0125                         693013             4,000  
                                                                              
Clydesdale Nominees HGB0125                         694478            20,000  
                                                                              
Clydesdale Nominees HGB0125                         694516             8,000  
                                                                              
Clydesdale Nominees HGB0125                         697515             5,165  
                                                                              
Clydesdale Nominees HGB0125                         697710            14,500  
                                                                              
Clydesdale Nominees HGB0125                         697128            14,500  
                                                                              
Clydesdale Nominees HGB0125                         697736             2,160  
                                                                              
Clydesdale Nominees HGB0125                        3102406             2,650  
                                                                              
Clydesdale Nominees HGB0125                         639213             1,720  
                                                                              
INVESTORS BANK AND TRUST CO.                                         139,458  
                                                                              
INVESTORS BANK AND TRUST CO.                                       1,340,306  
                                                                              
INVESTORS BANK AND TRUST CO.                                         219,002  
                                                                              
INVESTORS BANK AND TRUST CO.                                           6,612  
                                                                              
INVESTORS BANK AND TRUST CO.                                         758,257  
                                                                              
INVESTORS BANK AND TRUST CO.                                          41,120  
                                                                              
INVESTORS BANK AND TRUST CO.                                         133,319  
                                                                              
INVESTORS BANK AND TRUST CO.                                       2,854,641  
                                                                              
INVESTORS BANK AND TRUST CO.                                         471,550  
                                                                              
INVESTORS BANK AND TRUST CO.                                          13,915  
                                                                              
INVESTORS BANK AND TRUST CO.                                           7,716  
                                                                              
INVESTORS BANK AND TRUST CO.                                         101,536  
                                                                              
INVESTORS BANK AND TRUST CO.                                          16,016  
                                                                              
INVESTORS BANK AND TRUST CO.                                         118,800  
                                                                              
INVESTORS BANK AND TRUST CO.                                       1,011,010  
                                                                              
JP MORGAN (BGI CUSTODY)                              16331            91,214  
                                                                              
JP MORGAN (BGI CUSTODY)                              16338            34,727  
                                                                              
JP MORGAN (BGI CUSTODY)                              16341           326,627  
                                                                              
JP MORGAN (BGI CUSTODY)                              16342            66,918  
                                                                              
JP MORGAN (BGI CUSTODY)                              16400         5,685,653  
                                                                              
JP MORGAN (BGI CUSTODY)                              17011             9,159  
                                                                              
JP MORGAN (BGI CUSTODY)                              18409           258,037  
                                                                              
JPMORGAN CHASE BANK                                                   94,555  
                                                                              
JPMORGAN CHASE BANK                                                  159,744  
                                                                              
JPMorgan Chase Bank                                                   16,819  
                                                                              
JPMorgan Chase Bank                                                    6,025  
                                                                              
JPMorgan Chase Bank                                                    1,305  
                                                                              
JPMorgan Chase Bank                                                    5,462  
                                                                              
JPMorgan Chase Bank                                                   38,666  
                                                                              
JPMorgan Chase Bank                                                    3,806  
                                                                              
JPMorgan Chase Bank                                                   76,537  
                                                                              
JPMorgan Chase Bank                                                    6,073  
                                                                              
JPMorgan Chase Bank                                                   12,699  
                                                                              
JPMorgan Chase Bank                                                   74,789  
                                                                              
JPMorgan Chase Bank                                                   23,554  
                                                                              
JPMorgan Chase Bank                                                  296,149  
                                                                              
JPMorgan Chase Bank                                                   60,597  
                                                                              
JPMorgan Chase Bank                                                   86,862  
                                                                              
Mellon Trust & SF Boston                                              70,761  
                                                                              
Mellon Trust & SF Boston                                              77,092  
                                                                              
Mellon Trust of New England                                           88,556  
                                                                              
Mitsubishi Trust International                                         3,617  
                                                                              
NORTHERN TRUST BANK - BGI SEPA                                        21,922  
                                                                              
NORTHERN TRUST BANK - BGI SEPA                                        95,935  
                                                                              
NORTHERN TRUST BANK - BGI SEPA                                       113,105  
                                                                              
R C Greig Nominees Limited a/c         BL1                            68,851  
                                                                              
R C Greig Nominees Limited a/c         CM1                            27,347  
                                                                              
R C Greig Nominees Limited GP1         GP1                           123,923  
                                                                              
R C Greig Nominees Limited SA1         SA1                            38,306  
                                                                              
Reflex Nominees Ltd                                                    2,379  
                                                                              
Reflex Nominees Ltd                                                    4,531  
                                                                              
State Street                                                           9,514  
                                                                              
STATE STREET BOSTON                                                  395,694  
                                                                              
STATE STREET BOSTON                                                   47,874  
                                                                              
Wells Fargo Seattle                                                    9,423  
                                                                              
ZEBAN NOMINEES LIMITED                                                  6920  
                                                                              
Total                                                             16,835,297  

                                      -0-                                      

United Utilities' ordinary and `A' shares 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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