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 issuerof existing shares to which voting rights are United Utilities Group PLCattached:ii 2 Reason for the notification (please tick the appropriate box or boxes): An acquisition or disposal of voting rights

An acquisition or disposal of qualifying financial instruments which may result Xin 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): BTG PACTUAL GLOBAL ASSET3. Full name of person(s) subject to the MANAGEMENTnotification obligation:iii LIMITED BTG PACTUAL ABSOLUTE RETURN II MASTER FUND LP, BTG PACTUAL GLOBAL4. Full name of shareholder(s) EMERGING (if different from 3.):iv MARKETS AND MACRO MASTER FUND LP, AND BTG PACTUAL GEO MASTER FUND LP 5. Date of the transaction and date onwhich the threshold is crossed or 11 March 2013reached: v 6. Date on which issuer notified: 13 March 2013 7. Threshold(s) that is/are crossed or 5%reached: vi, vii 8. Notified details: A: Voting rights attached to shares viii, ix Class/ Situation previous Resulting situation after the triggering transactiontype of to the triggeringshares transaction if Number Number Number Number of voting % of voting rightspossible of of of shares rights xusing Shares Votingthe ISIN RightsCODE Indirect Direct Direct xi xii Direct Indirect B: Qualifying Financial Instruments Resulting situation after the triggering transaction Type of financial Expiration Exercise/ Number of voting % of votinginstrument date xiii Conversion Period rights that may be rights xiv acquired if the instrument is exercised/ converted. 50,855,681 7.46% Contract forDifference C: Financial Instruments with similar economic effect to Qualifying FinancialInstruments xv, xvi Resulting situation after the triggering transaction Type of Exercise Expiration Exercise/ Number of voting % of voting rightsfinancial price date xvii Conversion rights instrument xix, xxinstrument period xviii refers to Nominal Delta Total (A+B+C) Number of voting rights Percentage of voting rights 50,855,681 7.46%

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: N/A 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: BTG PACTUAL EUROPE LLP14. Contact name: Luiz Kokubo, Compliance Officer 0207-647-491115. Contact telephone number: [email protected]