UNITED UTILITIES PLC                              

                                1 FEBRUARY 2005                                

We received a notification today, from Barclays PLC notifying of its interest
as at 28 January 2005 12,730,249 `A' shares in United Utilities PLC amounting
to 4.12% of the issued `A' share capital.

Registered Holder                            Account            Holding
                                         Designation                   
                                                                       
Bank of Ireland                                                  43,270
                                                                       
BARCLAYS CAPITAL NOMINEES LIMI                                5,666,927
                                                                       
BARCLAYS TRUST CO AS EXEC/ADM                                       377
                                                                       
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                   694478             11,111
                                                                       
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.                                  1,578,114
                                                                       
INVESTORS BANK AND TRUST CO.                                    432,169
                                                                       
INVESTORS BANK AND TRUST CO.                                     22,359
                                                                       
INVESTORS BANK AND TRUST CO.                                     74,345
                                                                       
INVESTORS BANK AND TRUST CO.                                      8,898
                                                                       
INVESTORS BANK AND TRUST CO.                                      4,273
                                                                       
INVESTORS BANK AND TRUST CO.                                     75,305
                                                                       
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          3,253,817
                                                                       
JP MORGAN (BGI CUSTODY)                        17011              4,730
                                                                       
JP MORGAN (BGI CUSTODY)                        18409            157,367
                                                                       
JPMORGAN CHASE BANK                                               9,057
                                                                       
JPMorgan Chase Bank                                              37,966
                                                                       
JPMorgan Chase Bank                                             162,365
                                                                       
JPMorgan Chase Bank                                               3,373
                                                                       
JPMorgan Chase Bank                                              33,765
                                                                       
JPMorgan Chase Bank                                               9,152
                                                                       
JPMorgan Chase Bank                                              39,011
                                                                       
JPMorgan Chase Bank                                              13,085
                                                                       
JPMorgan Chase Bank                                               2,905
                                                                       
JPMORGAN CHASE BANK                                              49,842
                                                                       
JPMorgan Chase Bank                                               7,618
                                                                       
JPMorgan Chase Bank                                              19,858
                                                                       
JPMorgan Chase Bank                                               3,723
                                                                       
Mellon Trust - Boston & SF                                       46,761
                                                                       
Mitsubishi Trust International                                    2,457
                                                                       
R C Greig Nominees Limited a/c                   BL1             23,631
                                                                       
R C Greig Nominees Limited a/c                   CM1             10,022
                                                                       
R C Greig Nominees Limited GP1                   GP1             49,850
                                                                       
R C Greig Nominees Limited SA1                   SA1             17,420
                                                                       
Reflex Nominees Limited                                           1,127
                                                                       
Reflex Nominees Limited                                             658
                                                                       
State Street                                                      5,803
                                                                       
STATE STREET BOSTON                                             266,977
                                                                       
STATE STREET BOSTON                                              26,568
                                                                       
WELLS FARGO SEATTLE - WIRE BAN                                    5,104
                                                                       
ZEBAN NOMINEES LIMITED                                              156
                                                                       
Total                                                        12,730,249

                                      -0-                                      

United Utilities' ordinary 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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