Exhibit 99.4
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 Designation | | | Holding | |
| | | | | | | | |
| | | | | | | | |
| 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 | |
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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’.
