Notification of Major Interest in Shares

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

EnQuest PLC

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):

3. Full name of person(s) subject to the notification obligation:

Legis Trust Limited as Trustee of the Lamia Trust of which Mr Ayman Asfari is a potential beneficiary.

4. Full name of shareholder(s) (if different from 3.):

 N/A

5. Date of the transaction and date on which the threshold is crossed or reached:

 11 June 2010

6. Date on which issuer notified:

 14 June 2010

7. Threshold(s) that is/are crossed or reached:

 5%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares

if possible using the ISIN CODE

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

Number of Shares

Number of Voting Rights

Number of shares

Number of voting rights

% of voting rights

Direct

Direct

Indirect

Direct

Indirect

 Ordinary

 38,782,114

38,782,114

31,782,114

31,782,114

 Nil

4.100

Nil

 GB00B635TG28

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/ Conversion Period

Number of voting rights that may be acquired if the instrument is exercised/ converted.

% of voting rights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Exercise price

Expiration date

Exercise/ Conversion period

Number of voting rights instrument refers to

% of voting rights

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

31,782,114

4.100

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable:

Proxy Voting:

10. Name of the proxy holder:

 N/A

11. Number of voting rights proxy holder will cease to hold:

 N/A

12. Date on which proxy holder will cease to hold voting rights:

 N/A

13. Additional information:

Notification is based on a total voting rights figure of 775,027,922.

Ayman Asfari is a beneficiary of the Lamia Trust. Mr Asfari also holds 12,500,000 EnQuest PLC shares in his own name.

Following the sale Ayman Asfari personally and through trust structures holds 44,282,114 shares equating to 5.714% of the Company.

14. Contact name:

Paul Waters

Company Secretary

15. Contact telephone number:

+44 (0) 20 7925 4900