Holding in Company

Financial Services Authority

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES
 
1. Identity of the issuer or the underlying               United Utilities Group Plc
issuer
of existing shares to which voting rights are
attached:
 
2. Reason for the notification (please tick the appropriate box or boxes):
An acquisition or disposal of voting rights                                          Yes
 
An acquisition or disposal of qualifying financial instruments which may
result in the acquisition of shares already issued to which voting rights are
attached.
 
An acquisition or disposal of instruments with similar economic effect to
qualifying financial instruments
 
An event changing the breakdown of voting rights
 
Other (please
specify):
 
3. Full name of person(s) subject to the           Legal & General Group Plc (L&G)
notification obligation:

4. Full name of shareholder(s)             Legal & General Assurance (Pensions Management)
(if different from 3.):                                     Limited (PMC)
                                                           
 
5. Date of the transaction and date on                     2 November 2009
which the threshold is crossed or
reached:
 
6. Date on which issuer notified:                          4 November 2009

7. Threshold(s) that is/are crossed or                         3% (L&G)
reached:
 
8. Notified details:
 
A: Voting rights attached to shares

Class/type of            Situation previous                               Resulting situation
shares                    to the triggering                               after the triggering
                             transaction                                      transaction
 
if possible
using
the ISIN CODE
                      Number         Number         Number             Number              % of voting
                     of Shares      of Voting      of shares         of voting               rights
                                     Rights                            rights

                                                                 Direct      Indirect   Direct    Indirect

Ordinary Shares     35,472,365     35,472,365     27,122,970   27,122,970                3.97
GB00B39J2M42
                      Previous disclosure under
                    United Utilities Plc October
                                2007

 
B: Qualifying Financial Instruments

Resulting situation after the triggering transaction
 
     Type of financial        Expiration           Exercise/            Number of voting      % of voting
         instrument              date          Conversion Period       rights that may be        rights
                                                                         acquired if the
                                                                          instrument is
                                                                      exercised/ converted.
 
C: Financial Instruments with similar economic effect to Qualifying Financial Instruments
Resulting situation after the triggering transaction
 
  Type of financial     Exercise    Expiration     Exercise/    Number of voting rights     % of voting
      instrument          price        date        Conversion     instrument refers to        rights
                                                     period
 
                                                                                          Nominal    Delta
 
Total (A+B+C)
Number of voting rights                                    Percentage of voting rights

          27,122,970                                                   3.97
 
9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable:
 
Legal & General Group Plc (Direct and Indirect) (Group)

Legal & General Investment Management (Holdings) Limited (LGIMH) (Direct and
Indirect)

Legal & General Investment Management Limited (Indirect) (LGIM)

                    Legal & General Group Plc (Direct) (L&G) (27,122,970 -3.97 % = LGAS, LGPL & PMC)

Legal & General Investment Management (Holdings) Limited (Direct)  Legal & General Insurance Holdings Limited (Direct)
(LGIMHD) (24,740,894 -3.63 % = PMC)                                (LGIH)

Legal & General Assurance (Pensions Management) Limited (PMC)      Legal & General Assurance Society Limited (LGAS &
(24,740,894 -3.63 % = PMC)                                         LGPL)

                                                                   Legal & General Pensions Limited (Direct) (LGPL)
 
Proxy Voting:

10. Name of the proxy holder:                                  N/A

11. Number of voting rights proxy holder will cease            N/A
to hold:

12. Date on which proxy holder will cease to hold              N/A
voting rights:
 
                                                      Notification using the
13. Additional information:                         total voting rights figure
                                                          of 681,536,032
 
14. Contact name:                                       Helen Lewis (LGIM)

15. Contact telephone number:                             020 3124 3851