Blocklisting - Interim Review

BLOCK LISTING SIX MONTHLY RETURN Information provided on this form must be typed or printed electronically andprovided to an ris. Date: 31 July 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, and the Long Term Plan 2013 Period of return: From: 01/02/2013 To: 31/07/2013 Balance of unallotted securities under 9,492,815scheme(s) from previous return: Plus: The amount by which the block NILscheme(s) has been increased since thedate of the last return (if anyincrease has been applied for): Less: Number of securities issued/ NILallotted under scheme(s) during period(see LR3.5.7G): Equals: Balance under scheme(s) not 9,492,815yet issued/allotted at end of period: Name of contact: Jane Gilmore Telephone number of contact: 01925 237052