Holding(s) in Company

For filings with the FSA include the annex                                              
                                                                                        
For filings with issuer exclude the annex                                               
                                                                                        
                                                                                        
                                                                                        
TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi                                         
                                                                                        
                                                                                        
                                                                                        
1. Identity of the issuer or the underlying issuer                     United Utilities 
of existing shares to which voting rights are                             Group plc     
attached:ii                                                                             
                                                                                        
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 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                              Invesco Limited   
notification obligation:iii                                                             
                                                                                        
4. Full name of shareholder(s)                                                          
 (if different from 3.):iv                                                              
                                                                                        
5. Date of the transaction and date on                                                  
which the threshold is crossed or                                     25 November 2010  
reached: v                                                                              
                                                                                        
6. Date on which issuer notified:                                     3 December 2010   
                                                                                        
7. Threshold(s) that is/are crossed or                                   5%, 4%, 3%     
reached: vi, vii                                                                        
                                                                                        


 

8. Notified details:                                                                                                
                                                                                                                    
A: Voting rights attached to shares viii, ix                                                                        
                                                                                                                    
Class/type   Situation previous                         Resulting situation after the triggering transaction        
of           to the triggering                                                                                      
shares       transaction                                                                                            
                                                                                                                    
             Number                   Number            Number   Number of voting              % of  voting rights x
if possible  of                       of                of       rights                                             
using        Shares                   Voting            shares                                                      
the ISIN                              Rights                                                                        
CODE                                                    Direct   Direct xi           Indirect  Direct  Indirect     
                                                                                     xii                            
                                                                                                                    
Ordinary 5p                                                                                                         
Shares       35,120,065               35,120,065                                     3,123,086         0.45%        
                                                                                                                    
GB00B39J2M42                                                                                                        
                                                                                                                    
                                                                                                                    
                                                                                                                    
B: Qualifying Financial Instruments                                                                                 
                                                                                                                    
Resulting situation after the triggering transaction                                                                
                                                                                                                    
Type of        Expiration              Exercise/                  Number of voting                   % of voting    
financial      date xiii               Conversion Period xiv      rights that may be                 rights         
instrument                                                        acquired if the                                   
                                                                  instrument is                                     
                                                                  exercised/ converted.                             
                                                                                                                    
                                                                                                                    
                                                                                                                    
                                                                                                                    
                                                                                                                    
C: Financial Instruments with similar economic effect to Qualifying Financial                                       
Instruments xv, xvi                                                                                                 
                                                                                                                    
Resulting situation after the triggering transaction                                                                
                                                                                                                    
Type of       Exercise price          Expiration date Exercise/  Number of voting rights          % of voting rights
financial                             xvii            Conversion instrument refers to             xix, xx           
instrument                                            period                                                        
                                                      xviii                                                         
                                                                                                                    
                                                                                                  Nominal Delta      
                                                                                                                    
                                                                                                                    
                                                                                                                    
                                                                                                                    
                                                                                                                    
Total (A+B+C)                                                                                                       
                                                                                                                    
Number of voting rights                                      Percentage of voting rights                            
                                                                                                                    
3,123,086                                                    0.45%                                                  
                                                                                                                    


 

9. Chain of controlled undertakings through which the voting rights and/or the          
financial instruments are effectively held, if applicable: xxi                          
                                                                                        
                                                                                        
                                                                                        
Brown Brothers Harriman (New Jersey) - 71,208                                           
                                                                                        
Bank of New York - 1,326,672                                                            
                                                                                        
Banque Paribas (Frankfurt) - 3,073                                                      
                                                                                        
Bank of New York Mellon - 2,156                                                         
                                                                                        
JP Morgan Chase - 130,000                                                               
                                                                                        
Japan Trustee Services Bank - 66,419                                                    
                                                                                        
Master Trust Bank JP - 572,144                                                          
                                                                                        
Invesco PowerShares Capital Management Ltd - 885,058                                    
                                                                                        
Invesco Advisers Inc. - 66,356                                                          
                                                                                        
                                                                                        
                                                                                        
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:                                                       Sam Edwards     
                                                                                        
15. Contact telephone number:                                           01491 416381    
                                                                                        


 

Note: Annex should only be submitted to the FSA not the issuer                          
                                                                                        
Annex: Notification of major interests in sharesxxii                                    
                                                                                        
                                                                                        
                                                                                        
A: Identity of the persons or legal entity subject to the notification                  
obligation                                                                              
                                                                                        
Full name                                                                               
                                                                                        
(including legal form of legal entities)                                                
                                                                                        
                                                                                        
                                                                                        
Contact address                                                                         
                                                                                        
(registered office for legal entities)                                                  
                                                                                        
                                                                                        
                                                                                        
Phone number & email                                                                    
                                                                                        
                                                                                        
                                                                                        
Other useful information                                                                
                                                                                        
(at least legal representative for legal persons)                                       
                                                                                        
                                                                                        
                                                                                        
                                                                                        
                                                                                        
B: Identity of the notifier, if applicable                                              
                                                                                        
Full name                                                                               
                                                                     Invesco Limited    
                                                                                        
                                                                                        
Contact address                                                    Registered address:  
                                                                                        
                                                                   30 Finsbury Square,  
                                                                    London. EC2A 1AG    
                                                                                        
Phone number & email                                                                    
                                                                      020 7638 0731     
                                                                                        
                                                                                        
Other useful information                                                                
                                                                                        
(e.g. functional relationship with the person or legal entity                           
subject to the notification obligation)                                                 
                                                                                        
                                                                                        
                                                                                        
C: Additional information                                                               
                                                                                        
                                                                                        
                                                                                        
For notes on how to complete form TR-1 please see the FSA website.