UNITED UTILITIES PLC                              

                                 12 APRIL 2005                                 

We received a notification yesterday, from Barclays PLC notifying of its
interest as at 5 April 2005 in 18,195,774 `A' shares in United Utilities PLC
amounting to 5.88% of the issued `A' share capital.

Registered Holder                            Account            Holding
                                         Designation                   
                                                                       
Bank of Ireland                                                  43,270
                                                                       
BARCLAYS CAPITAL NOMINEES LIMI                               11,020,357
                                                                       
Barclays Trust Co DMC69                                           2,500
                                                                       
Barclays Trust Co R69                                             4,075
                                                                       
CHASE NOMINEES LTD                             16376            174,946
                                                                       
Clydesdale Nominees HGB0125                   693013              2,222
                                                                       
Clydesdale Nominees HGB0125                   694516              4,444
                                                                       
Clydesdale Nominees HGB0125                   697710              8,056
                                                                       
Clydesdale Nominees HGB0125                   697728              8,056
                                                                       
Clydesdale Nominees HGB0125                  3102406              1,472
                                                                       
INVESTORS BANK AND TRUST CO.                                      4,038
                                                                       
INVESTORS BANK AND TRUST CO.                                     22,827
                                                                       
INVESTORS BANK AND TRUST CO.                                  1,582,803
                                                                       
INVESTORS BANK AND TRUST CO.                                     73,969
                                                                       
INVESTORS BANK AND TRUST CO.                                    420,498
                                                                       
INVESTORS BANK AND TRUST CO.                                     66,449
                                                                       
INVESTORS BANK AND TRUST CO.                                      4,273
                                                                       
INVESTORS BANK AND TRUST CO.                                      8,898
                                                                       
JP MORGAN (BGI CUSTODY)                        16331            101,305
                                                                       
JP MORGAN (BGI CUSTODY)                        16338             20,055
                                                                       
JP MORGAN (BGI CUSTODY)                        16341            180,353
                                                                       
JP MORGAN (BGI CUSTODY)                        16342             37,411
                                                                       
JP MORGAN (BGI CUSTODY)                        16400          3,389,683
                                                                       
JP MORGAN (BGI CUSTODY)                        17011              4,730
                                                                       
JP MORGAN (BGI CUSTODY)                        18409            143,036
                                                                       
JPMORGAN CHASE BANK                                              52,128
                                                                       
JPMorgan Chase Bank                                               2,905
                                                                       
JPMorgan Chase Bank                                              13,085
                                                                       
JPMorgan Chase Bank                                             164,338
                                                                       
JPMorgan Chase Bank                                              61,976
                                                                       
JPMorgan Chase Bank                                              42,468
                                                                       
JPMorgan Chase Bank                                              41,496
                                                                       
JPMorgan Chase Bank                                               3,373
                                                                       
JPMorgan Chase Bank                                              33,765
                                                                       
JPMORGAN CHASE BANK                                               9,152
                                                                       
JPMorgan Chase Bank                                               9,632
                                                                       
JPMorgan Chase Bank                                              21,010
                                                                       
JPMorgan Chase Bank                                                 742
                                                                       
JPMorgan Chase Bank                                               7,618
                                                                       
JPMorgan Chase Bank                                               2,940
                                                                       
Mellon Trust - Boston & SF                                       43,264
                                                                       
Mitsubishi Trust International                                    2,457
                                                                       
R C Greig Nominees Limited a/c                   BL1             21,011
                                                                       
R C Greig Nominees Limited a/c                   CM1              8,802
                                                                       
R C Greig Nominees Limited GP1                   GP1             46,788
                                                                       
R C Greig Nominees Limited SA1                   SA1             15,656
                                                                       
Reflex Nominees Limited                                             658
                                                                       
Reflex Nominees Limited                                           1,127
                                                                       
State Street                                                      5,803
                                                                       
STATE STREET BOSTON                                             222,026
                                                                       
STATE STREET BOSTON                                              26,568
                                                                       
WELLS FARGO SEATTLE - WIRE BAN                                    5,104
                                                                       
ZEBAN NOMINEES LIMITED                                              156
                                                                       
Total                                                        18,195,774

                                      -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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