UNITED UTILITIES GROUP PLC: Blocklisting - Interim Review

BLOCK LISTING SIX MONTHLY RETURN

Information provided on this form must be typed or printed electronically and provided to an ris.

Date: 31 January 2013

Name of applicant: UNITED UTILITIES GROUP PLC

Name of schemes: United Utilities Group 2008 Savings

                                       related share Option Scheme, United     
                                       Utilities Group 2008 Performance Share  
                                       Plan, United Utilities Group 2008       
                                       Matching Share Award Plan, United       
                                       Utilities PLC Approved Share Option Plan
                                       1999, United Utilities PLC Unapproved   
                                       Share Option Plan 1999 and United       
                                       Utilities Executive Share Option Scheme.

Period of return: From: 01/08/2012 To: 31/01/2013

Balance of unallotted securities under 9,496,363 scheme(s) from previous return:

Plus: The amount by which the block NIL scheme(s) has been increased since the date of the last return (if any increase has been applied for):

Less: Number of securities issued/ 3,548 allotted under scheme(s) during period (see LR3.5.7G):

Equals: Balance under scheme(s) not 9,492,815 yet issued/allotted at end of period:

Name of contact: Jane Gilmore

Telephone number of contact: 01925 237052

END

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