Exhibit 99.1
UNITED UTILITIES PLC
PERFORMANCE SHARE PLAN
1 JULY 2005
The following contingent option awards were granted on 30 June 2005 pursuant to the performance share plan approved by the shareholders at the Annual General Meeting on 21 July 2000. The figures reflect the maximum number of shares over which the option might be exercised. The actual number will depend upon the extent to which the established performance conditions are satisfied over the performance period.
| Name of director/senior manager discharging managerial responsibilities | | | No. of Ordinary shares | | | Price paid for award £ | | | Price payable on exercise £ | | | Performance period | |
| John Roberts | | | 61,324 | | | nil | | | nil | | | 01/04/2005 to 31/03/2008 | |
| Simon Batey | | | 42,160 | | | nil | | | nil | | | 01/04/2005 to 31/03/2008 | |
| Charlie Cornish | | | 30,419 | | | nil | | | nil | | | 01/04/2005 to 31/03/2008 | |
| Tom Drury | | | 37,719 | | | nil | | | nil | | | 01/04/2005 to 31/03/2008 | |
| Gordon Waters | | | 35,772 | | | nil | | | nil | | | 01/04/2005 to 31/03/2008 | |
| Linda Booth | | | 18,251 | | | nil | | | nil | | | 01/04/2005 to 31/03/2008 | |
| Hugh Logan | | | 22,997 | | | nil | | | nil | | | 01/04/2005 to 31/03/2008 | |
| Ian Priestner | | | 11,864 | | | nil | | | nil | | | 01/04/2005 to 31/03/2008 | |
| Tim Rayner | | | 16,883 | | | nil | | | nil | | | 01/04/2005 to 31/03/2008 | |
Further information can be obtained from Tim Rayner, Company Secretary 44 1 925 237071.
-
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".
