Notification of Holding in United Utilities - Tradewinds fallen to 2.548%

1.Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached[i]:

United Utilities Group PLC    

2. Reason for the notification     (please tick the appropriate box or boxes)

An acquisition or disposal of voting rights

X

An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

An event changing the breakdown of voting rights

Other (please specify): 

3. Full name of person(s) subject to the notification obligation[ii]:

Tradewinds Global Investors, LLC

NWQ Holdings, LLC

Nuveen Investments, Inc.

Windy City Investments, Inc.

Windy City Investments Holdings, LLC

MDCP Holdco (Windy), LLC

Madison Dearborn Capital Partners V-A, L.P.

Madison Dearborn Capital Partners V-C, L.P.

Madison Dearborn Capital Partners V Executive-A, L.P.

Madison Dearborn Partners V-A&C, L.P.

4. Full name of shareholder(s) (if different from 3.)[iii]:

5. Date of the transaction (and date on which the threshold is crossed or reached if different)[iv]:

16 June 2010

6. Date on which issuer notified:

17 June 2010

7. Threshold(s) that is/are crossed or reached:

2%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares

 if possible using the ISIN CODE

Situation previous to the triggering transaction [v]

Resulting situation after the triggering transaction[vi]

Number of Shares

Number of Voting Rights ^viii

Number of shares

Number of voting rights ^ix

% of voting rights

Direct

Direct  ^x

Indirect ^xi

Direct

Indirect

US91311E1029

GB00B39J2M42

9,052,980

3,385,051

8,683,290

0

8,683,290

0

2.55%

0%

B: Financial Instruments

Resulting situation after the triggering transaction ^xii

Type of financial instrument

Expiration date ^xiii

Exercise/ Conversion  Period/ Date^xiv

Number of voting rights that may be acquired if the instrument is exercised/ converted.

% of voting rights

     N/A

Total (A+B)

Number of voting rights

% of voting rights

 17,366,580 (this total represents total ADRs converted into Ordinary share equivalents in addition to Ordinary shares held 1 ADR=2 ORDs)

    2.55%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable ^xv:

The voting rights are held by Tradewinds Global Investors, LLC which is controlled by NWQ Holdings, LLC, which is in turn controlled by Nuveen Investments, Inc, which is in turn controlled by Windy City Investments, Inc., which is in turn controlled by Windy City Investments Holdings, L.L.C., which is in turn controlled by MDCP Holdco (Windy), LLC, which is in turn controlled by Madison Dearborn Partners V-A&C, L.P. through its management of various private equity funds:  Madison Dearborn Capital Partners V-A, L.P., Madison Dearborn Capital Partners V-C, L.P., and Madison Dearborn Capital Partners V Executive-A, L.P.

Proxy Voting:

10. Name of the proxy holder:

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

12. Date on which proxy holder will cease to hold voting rights:

13. Additional information:

14. Contact name:

Macfarlanes

15. Contact telephone number:

020 7831 9222