UU. United Utilities Group Plc

    BLOCK LISTING SIX MONTHLY RETURN                        

Information provided on this form must be typed or printed electronically.

To: The FSA

Date: _31 July_2007

Name of applicant:                  UNITED UTILITIES PLC                       
                                                                               
Name of scheme:                     UNITED UTILITIES SAYE SHARE OPTION SCHEME  
                                                                               
Period of return:          From:    1.2.07         To:    31.7.2007            
                                                                               
Balance under scheme from previous  288,261                                    
return:                                                                        
                                                                               
The amount by which the block       3,020,000                                  
scheme has been increased, if the                                              
scheme has been increased since the                                            
date of the last return:                                                       
                                                                               
Number of securities issued/        2,434,289                                  
allotted under scheme during                                                   
period:                                                                        
                                                                               
Balance under scheme not yet issued 585,711                                    
/allotted at end of period                                                     
                                                                               
Number and class of securities      MARCH 1991- 1,000,000, DECEMBER 1994 -     
originally listed and the date of   4,600,000, FEBRUARY 1998 02,500,000,       
admission                           JANUARY 2001 -2,000,000 JANUARY 2002 -     
                                    2,750,000, JANUARY 2003 - 2,000,000        
                                    FEBRUARY 2005 - 3,000,000 , FEBRUARY 2007 -
                                    3,020,000                                  
                                                                               
Total number of securities in issue 880,204,324                                
at the end of the period                                                       

Name of contact:                        J Gilmore                              
                                                                               
Address of contact:                     Haweswater House, Lingley Mere Business
                                        Park, Great Sankey, Warrington         
                                                                               
                                        WA5 3LP                                
                                                                               
Telephone number of contact:            01925 237052                           

SIGNED BY J Gilmore______________________________________________

Assistant Company Secretary

for and on behalf of

UNITED UTILITIES PLC

If you knowingly or recklessly give false or misleading information you may be
liable to prosecution.



END

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