TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES i)

For filings with the FSA include the annex For filings with issuer exclude the annex TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES i) 1. Identity of the issuer or the underlying issuer of existing shares to which voting EnQuest PLC rights are attached: ii) 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 result in the acquisition of shares already issued to which voting rights are attached An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments An event changing the breakdown of voting rights Other (please specify): Lorito Holdings (Guernsey) Limited & 3. Full name of person(s) Zebra Holdings and Investments (Guernsey) subject to the Limited both of 1st & 2nd Floors, notification obligation: iii) Elizabeth House, Les Ruettes Brayes, St Peter Port, Guernsey GY1 1EW 4. Full name of shareholder(s) N/A (if different from 3.):iv) 5. Date of the transaction and date on which the threshold is crossed 9 April 2010 or reached: v) 6. Date on which issuer 23 April 2010 notified: 7. Threshold(s) that is/are crossed or 15% reached:vi, vii) 8. Notified details: A: Voting rights attached to shares viii, ix) Class/type Situation previous Resulting situation after the triggering of to the triggering transaction shares transaction Number Number Number Number of voting % of voting if possible of of of shares rights rights x) using Shares Voting the ISIN Rights Direct Direct xi) Indirect xii) DirIndirect CODE Ordinary 102,864,417 102,864,417 Nil Nil & & Nil 15.Nil GB00B635TG28 14,612,072 14,612,072 B: Qualifying Financial Instruments Resulting situation after the triggering transaction Type of ExpiratioExercise/ Number of voting % of voting financial date xiii) Conversion Period xiv) rights that may be rights instrument acquired if the instrument is exercised/ converted. C: Financial Instruments with similar economic effect to Qualifying Financial Instrumentsxv, xvi) Resulting situation after the triggering transaction Type of Exercise Expiration Exercise/ Number of voting rights % of voting financial price date xvii) Conversion instrument refers to rightsxix, xx) instrument period xviii) Nominal Delta Total (A+B+C) Number of voting rights Percentage of voting rights 117,476,489 15.16% 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable:xxi Proxy Voting: 10. Name of the proxy holder: N/A 11. Number of voting rights proxy holder will cease N/A to hold: 12. Date on which proxy holder will cease to hold N/A voting rights: 13. Additional Notification is based on a total voting rights information: figure of 775,027,922. Lorito Holdings (Guernsey) Limited holds 102,864,417 EnQuest shares Zebra Holdings and Investments (Guernsey) Limited holds 14,612,072 EnQuest shares C.L. Directors Limited 14. Contact name: Director of Lorito Holdings (Guernsey) Limited and Zebra Holdings and Investments (Guernsey) Limited 15. Contact telephone + 44 (0)1481 700300 number: