Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

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

Encore Oil 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: iii

Barclays Plc

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

Barclays Capital Securities Ltd

Gerrard Investment Management Ltd

5. Date of the transaction and date on which the threshold is crossed orreached: v

13 January 2012

6. Date on which issuer notified:

16 January 2012

7. Threshold(s) that is/are crossed orreached: vi, vii

7%

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type of shares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights x

Direct xi

Indirect xii

Direct

Indirect

GB00B06KL332

21,880,685

21,880,685

18,000,646

17,970,646

30,000

5.77%

0.01%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate xiii

Exercise/Conversion Period xiv

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financialInstrument

Expiration date xvii

Exercise/Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

Portfolio Swap

Portfolio Swap

Portfolio Swap

9 April 2012

6 August 2012

16 January 2012

24,333

247,665

1,066,729

0.01%

0.08%

0.34%

Total (A+B+C)

Number of voting rights

Percentage of voting rights

19,339,373

6.20%

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

Proxy Voting:

10. Name of the proxy holder:

11. Number of voting rights proxy holder will ceaseto hold:

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

13. Additional information:

14. Contact name:

Geoff Smith

15. Contact telephone number:

0207 116 2913

EnCore Oil plc

www.encoreoil.co.uk

Alan Booth, Chief Executive Officer

+44 (0)20 7224 4546

Eugene Whyms, Chief Financial Officer

Yvonne Fraser, Investor Relations Manager

+44 (0)7957 241 408

Cenkos Securities plc

Jon Fitzpatrick

+44 (0)20 7397 1951

Ken Fleming

+44 (0)131 220 9772