Rule 8.3 - BURREN ENERGY

FORM 8.3

    DEALINGS BY PERSONS WITH INTERESTS IN SECURITIES REPRESENTING 1% OR MORE
              (Rule 8.3 of the City Code on Takeovers and Mergers)


1.   KEY INFORMATION

Name of person dealing        BARCLAYS PLC
(Note 1)
Company dealt in              BURREN ENERGY
Class of relevant security    ORD GBP0.20
to which the dealings being
disclosed relate (Note 2)
Date of dealing               09 October 2007

2.   INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE

(a)  Interests and short positions (following dealing) in the class of relevant
security dealt in (Note 3)

                           Long                        Short

                     Number       (%)           Number       (%)

(1) Relevant        8,926,856   6.33%          241,699     0.17%
securities
(2) Derivatives       843,492   0.60%          558,398     0.40%
(other than
options)
(3) Options and             0    0.00%               0     0.00%
agreements to
purchase/sell

Total               9,770,348    6.93%          800,097    0.57%


(b)  Interests and short positions in relevant securities of the company, other
     than the class dealt in (Note 3)

Class of                    Long                     Short
relevant
security:

                  Number             (%)    Number            (%)

(1) Relevant
securities

(2) Derivatives
(other than
options)

(3) Options and
agreements to
purchase/sell

Total


(c)  Rights to subscribe (Note 3)

Class of relevant security:   Details



3.   DEALINGS (Note 4)

(a)  Purchases and sales

Purchase/sale Number of Securities Price per unit
                                   (GBP)
Purchase      50                   11.7290
Purchase      640                  11.8592
Purchase      42                   11.7190
Purchase      4,481                11.4556
Purchase      662                  11.6885
Purchase      258                  11.7090
Purchase      176                  11.2100
Purchase      100                  11.1400
Purchase      2                    11.7190
Purchase      359                  11.7390
Purchase      170                  11.8594
Purchase      3                    11.7390
Purchase      221                  11.6690
Purchase      44                   11.0600
Purchase      891                  11.2200
Purchase      126                  11.7290
Purchase      1,000                11.8190
Purchase      535                  9.2720
Purchase      428                  11.6590
Purchase      1,500                11.7300
Purchase      200                  11.2790
Purchase      33                   11.7390
Purchase      67,709               11.4512
Purchase      21,100               11.5534
Purchase      2,611                11.8088
Purchase      300                  11.0200
Purchase      575                  11.8480
Purchase      11,570               11.3455
Purchase      13,003               10.9038
Purchase      1,000                11.1100
Purchase      300                  11.2290
Purchase      96,000               8.7076
Purchase      64,000               8.7076
Purchase      221,250              11.6888
Purchase      11,694               10.8343
Purchase      221                  11.7888
Purchase      7,310                11.7009
Purchase      11,570               11.3455
Purchase      846                  11.7400
Purchase      43                   11.2100
Sale          45                   11.1500
Sale          640                  11.0500
Sale          1,151                11.0000
Sale          268                  11.6610
Sale          972                  11.6904
Sale          300                  11.1900
Sale          1,006                11.1800
Sale          500                  11.0000
Sale          198                  11.0500
Sale          2,250                11.1500
Sale          4,000                11.1700
Sale          500                  11.8505
Sale          820                  11.0200
Sale          700                  11.0500
Sale          800                  11.1500
Sale          200                  11.0800
Sale          400                  11.2600
Sale          225                  11.2300
Sale          500                  11.7310
Sale          600                  11.1300
Sale          1,000                11.1400
Sale          200                  11.0800
Sale          718                  11.6830
Sale          455                  11.1000
Sale          240                  11.7015
Sale          2,062                11.2000
Sale          190                  11.7208
Sale          1,500                10.9000
Sale          236                  11.1000
Sale          514                  11.0700
Sale          200                  11.7005
Sale          676                  11.7100
Sale          123                  11.7710
Sale          614                  9.2665
Sale          1,000                9.2630
Sale          354                  11.0500
Sale          649                  11.7008
Sale          1,000                11.1000
Sale          800                  11.7210
Sale          116                  11.6610
Sale          1,000                11.5000
Sale          923                  11.6600
Sale          1,300                11.7110
Sale          246                  11.6610
Sale          1,000                11.7110
Sale          402                  11.0900
Sale          260                  11.2000
Sale          220                  11.1110
Sale          4,500                11.0600
Sale          54                   11.2000
Sale          150                  10.8400
Sale          500                  11.0900
Sale          635                  11.1500
Sale          156                  11.7210
Sale          117                  11.8615
Sale          300                  11.5302
Sale          846                  11.9008
Sale          53                   11.2000
Sale          1,395                11.4000
Sale          100                  11.7700
Sale          171                  11.6415
Sale          102                  11.0500
Sale          270                  11.5000
Sale          165                  11.1700
Sale          641                  11.0600
Sale          750                  11.5700
Sale          100                  11.7808
Sale          847                  11.6515
Sale          2,000                11.6800
Sale          224                  11.7500
Sale          440                  11.7108
Sale          13,261               11.7300
Sale          300                  11.6000
Sale          166                  11.1700
Sale          500                  11.2000
Sale          181                  11.0500
Sale          200                  11.7015
Sale          1,000                11.2100
Sale          300                  10.8600
Sale          2,000                11.1900
Sale          891                  11.7112
Sale          753                  11.7210
Sale          160                  11.5115
Sale          127                  11.0700
Sale          150                  11.0700
Sale          157                  11.7215
Sale          500                  11.1200
Sale          100                  11.7010
Sale          300                  11.1300
Sale          100                  11.0600
Sale          839                  11.7610
Sale          300                  9.9947
Sale          1,000                11.7405
Sale          1,500                11.7210
Sale          113                  11.6610
Sale          110                  11.6510
Sale          100                  11.3600
Sale          1,003                11.7310
Sale          186                  11.7210
Sale          2,500                11.1010
Sale          100                  11.1800
Sale          170                  11.1500
Sale          100                  10.9016
Sale          200                  11.7110
Sale          200                  11.2000
Sale          500                  9.2765
Sale          378                  11.2100
Sale          500                  11.1207
Sale          500                  11.7304
Sale          575                  11.8480
Sale          41,979               11.2920
Sale          7,539                10.6547
Sale          32,494               11.8000
Sale          575                  11.8480
Sale          20,850               11.3117
Sale          11,570               11.3455
Sale          1,000                11.7100
Sale          200                  11.0486
Sale          500                  11.6710
Sale          550                  11.1207
Sale          175                  11.7216
Sale          750                  11.6515
Sale          639                  11.0700
Sale          800                  11.1800
Sale          15,524               11.7100
Sale          500                  11.8505
Sale          1,150                11.6515
Sale          600                  11.7008
Sale          333                  11.7610
Sale          1,000                9.9947
Sale          87                   11.7210
Sale          400                  11.7112
Sale          254                  11.6515
Sale          2,000                11.6605
Sale          113                  9.2660
Sale          200                  11.7208
Sale          200                  11.0700
Sale          74                   11.0000
Sale          1,500                11.5700
Sale          1,000                11.8512
Sale          396                  11.0900
Sale          535                  10.8400
Sale          600                  11.6702
Sale          250                  11.7205
Sale          132                  9.9947
Sale          617                  9.6922
Sale          243                  11.1000
Sale          1,000                11.7210
Sale          90                   11.7210
Sale          100                  11.1100
Sale          1,000                11.7110
Sale          357                  11.5000
Sale          600                  11.2000
Sale          3,000                11.2100
Sale          1,000                11.7010
Sale          5,000                11.7200
Sale          100                  11.8505
Sale          500                  11.1100
Sale          150                  11.1300
Sale          63                   11.6610
Sale          687                  11.1500
Sale          215                  9.4372
Sale          243                  11.5110
Sale          55                   11.8505
Sale          500                  11.2000
Sale          487                  9.2622
Sale          600                  11.5700
Sale          437                  11.0500
Sale          100                  9.9947
Sale          155                  11.7108
Sale          217                  11.7210
Sale          400                  11.1800
Sale          120                  11.1800
Sale          250                  9.2715
Sale          210                  11.6840
Sale          460                  11.0500
Sale          1,000                11.1900
Sale          250                  11.6520
Sale          100                  11.5825
Sale          114                  11.6500
Sale          633                  11.5700
Sale          1,000                11.2600
Sale          190                  11.7208
Sale          290                  11.0900

(b)  Derivatives transactions (other than options)

Product    Long/Short    Number of Securities  Price Per
name,      (Note 6)      (Note 7)              Unit (GBP)
e.g. CFD
CFD        Short         11694                 10.8343
CFD        Short         13003                 10.9037
CFD        Short         44154                 11.3118
CFD        Short         11570                 11.3454
CFD        Short         4481                  11.4555
CFD        Short         21100                 11.5534
CFD        Short         221250                11.6888
CFD        Short         7310                  11.7008
CFD        Short         23555                 11.7123
CFD        Short         19                    9.0563
CFD        Short         1537                  9.303
CFD        Long          7539                  10.6547
CFD        Long          200                   11.0486
CFD        Long          41979                 11.292
CFD        Long          20850                 11.3117
CFD        Long          120000                11.5941
CFD        Long          575                   11.848

(c)  Options transactions in respect of existing securities

(i)  Writing, selling, purchasing or varying

Product name,   Writing,          Number of          Exercise  Type, e.g.      Expiry   Option money
e.g. call       selling,          securities to      price     American,       date     paid/received
option          purchasing,       which the option             European etc.            per unit (GBP)
                varying etc.      relates (GBP)

(ii) Exercising

Product name, e.g.  Number of           Exercise price per
call option         securities          unit (Note 5)




(d)  Other dealings (including new securities) (Note 4)


Nature of transaction Details           Price per unit
(Note 8)                                (if applicable)
                                        (Note 5)





4.   OTHER INFORMATION
None

Agreements, arrangements or understandings relating to options or derivatives


Full details of any agreement, arrangement or understanding between the
person disclosing and any other person relating to the voting rights of
any relevant securities under any option referred to on this form or
relating to the voting rights or future acquisition or disposal of any
relevant securities to which any derivative referred to on this form is
referenced.  If none, this should be stated.





Is a Supplemental Form 8 attached? (Note 9)                 NO


Date of disclosure                         10 October 2007
Contact name                               BARCLAYS COMPLIANCE
Telephone number                           020 7116 2913
If a connected EFM, name of
offeree/offeror with which connected
If a connected EFM, state nature of
connection (Note 10)


Notes

The Notes on Form 8.3 can be viewed on the Takeover Panel's website at
www.thetakeoverpanel.org.uk