Holding(s) in Company

For filings with the FCA 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 Utilitiesof existing shares to which voting rights are Group Plcattached:ii GB00B39J2M42 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 resultin the acquisition of shares already issued to which voting rights are attached An acquisition or disposal of instruments with similar economic effect toqualifying financial instruments An event changing the breakdown of voting rights Other (please specify): 3. Full name of person(s) subject to the Norges Banknotification obligation:iii 4. Full name of shareholder(s) N/A (if different from 3.):iv 5. Date of the transaction and date onwhich the threshold is crossed or 6 January 2014reached: v 6. Date on which issuer notified: 7 January 2014 7. Threshold(s) that is/are crossed or Below 3%reached: vi, vii 8. Notified details: A: Voting rights attached to shares viii, ix Class/type Situation previous Resulting situation after the triggering transactionof to the triggeringshares transaction Number Number Number Number of voting % of voting rights xif possible of of of shares rightsusing Shares Votingthe ISIN Rights Direct Direct xi Indirect Direct IndirectCODE xii 20,484,273 20,484,273 20,433,472 20,433,472 2.997%GB00B39J2M42 B: Qualifying Financial Instruments Resulting situation after the triggering transaction Type of Expiration Exercise/ Number of voting % of votingfinancial date xiii Conversion Period xiv rights that may be rightsinstrument acquired if the instrument is exercised/ converted. N/A N/A N/A N/A N/A C: Financial Instruments with similar economic effect to Qualifying FinancialInstruments xv, xvi Resulting situation after the triggering transaction Type of Exercise price Expiration Exercise/ Number of voting rights % of voting rightsfinancial date xvii Conversion instrument refers to xix, xxinstrument period xviii N/A N/A N/A N/A N/A Nominal Delta N/A N/A Total (A+B+C) Number of voting rights Percentage of voting rights 20,433,472 2.997% 9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable: xxi N/A Proxy Voting: 10. Name of the proxy holder: Norges Bank 11. Number of voting rights proxy holder will cease N/Ato hold: 12. Date on which proxy holder will cease to hold N/Avoting rights: 13. Additional information: None 14. Contact name: Stanislav Boiadjiev 15. Contact telephone number: +47 2407 3142