TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

TR-1: 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 Nola Trust of which Mr
Maroun Semaan 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:   7 March 2011
6. Date on which issuer notified:                                       
          7 March 2011
7. Threshold(s) that is/are crossed or reached:                         
           3%

8. Notified details:
A: Voting rights attached to shares
Class/type of      Situation previous       Resulting situation after
the triggering transaction
shares             to the triggering
if possible using  transaction
the ISIN CODE
Number             Number       Number      Number of voting        %
of  voting rights
of                 of           of shares   rights
Shares             Voting
                   Rights
Direct             Direct       Indirect    Direct      Indirect
 Ordinary           30,068,799  30,068,799  20,068,799  20,068,799   Nil
 2.51           Nil
 GB00B635TG28

B: Qualifying Financial Instruments
Resulting situation after the triggering transaction
Type of financial  Expiration  Exercise/   Number of voting       % of
voting
instrument         date        Conversion  rights that may be     rights
                               Period      acquired if the
                                           instrument is
                                           exercised/ converted.

C: Financial Instruments with similar economic effect to Qualifying
Financial Instruments
Resulting situation after the triggering transaction
Type of financial  Exercise  Expiration  Exercise/   Number of voting  
% of voting rights
instrument         price     date        Conversion  rights instrument
                                         period      refers to
                                                                       
Nominal  Delta

Total (A+B+C)
Number of voting rights  Percentage of voting rights
20,068,799               2.51

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 799,462,905. Maroun Semaan is a beneficiary of the Nola
Trust. 
14. Contact name:              Paul WatersCompany Secretary
15. Contact telephone number:  +44(0)20 7925 4900