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               10 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        8,545,703   6.06%          253,995     0.18%
securities
(2) Derivatives     1,019,111   0.72%          606,105     0.43%
(other than
options)
(3) Options and             0    0.00%               0     0.00%
agreements to
purchase/sell

Total               9,564,814    6.78%          860,100    0.61%


(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      217                  11.4082
Purchase      1,168                11.5610
Purchase      2,712                11.5066
Purchase      200                  11.4294
Purchase      42                   11.7745
Purchase      1,000                11.4100
Purchase      848                  11.7890
Purchase      210                  11.4981
Purchase      500                  11.4490
Purchase      253                  11.7445
Purchase      11                   11.7745
Purchase      1,025                11.6080
Purchase      2,000                11.4700
Purchase      500                  11.4590
Purchase      1,412                11.5960
Purchase      500                  11.6740
Purchase      300                  11.6175
Purchase      8,819                11.5630
Purchase      1,000                11.4700
Purchase      1,910                11.5422
Purchase      1,000                11.5280
Purchase      4,200                11.5818
Purchase      26,898               11.5865
Purchase      2,203                11.5865
Purchase      2,203                11.5865
Purchase      21,074               11.6000
Sale          435                  11.6035
Sale          443                  11.6035
Sale          2,000                11.5235
Sale          265                  11.6020
Sale          133                  11.7155
Sale          328                  11.3755
Sale          300                  11.7050
Sale          246                  11.6435
Sale          268                  11.5120
Sale          131                  11.7155
Sale          750                  11.4455
Sale          248                  11.5035
Sale          291                  11.5720
Sale          427                  11.4436
Sale          500                  11.4255
Sale          500                  11.6215
Sale          76                   11.5335
Sale          54                   11.6008
Sale          116                  11.5820
Sale          188                  11.4935
Sale          33                   11.6435
Sale          2                    11.4635
Sale          200                  11.5035
Sale          800                  11.4435
Sale          124                  11.7135
Sale          304                  11.6048
Sale          100                  11.4435
Sale          87                   11.4235
Sale          50                   11.7155
Sale          1,000                11.6835
Sale          500                  11.5720
Sale          113                  11.4455
Sale          350                  11.5335
Sale          210                  11.4981
Sale          730                  11.6130
Sale          509                  11.5035
Sale          100                  11.7155
Sale          28,113               11.5362
Sale          4,874                11.5580
Sale          2,203                11.5865
Sale          36,128               11.5580
Sale          19,625               11.4808
Sale          251                  11.4000
Sale          2,712                11.5066
Sale          1,000                11.6222
Sale          1,137                9.2200
Sale          19,558               11.5580
Sale          210                  11.4981
Sale          20,935               11.5580
Sale          2,712                11.5066
Sale          2,127                11.5791
Sale          272,289              11.5580
Sale          12,208               11.5580
Sale          7,611                11.5580
Sale          640                  11.6015
Sale          130                  11.5535
Sale          130                  11.6215
Sale          200                  11.4935
Sale          5,100                11.6335
Sale          221                  11.4435
Sale          57                   11.7155
Sale          50                   11.7155
Sale          6,576                11.5580
Sale          111                  11.5030
Sale          104                  11.7155
Sale          8                    11.4935
Sale          132                  11.5135
Sale          115                  11.4435
Sale          217                  11.5330
Sale          503                  11.5220
Sale          200                  11.5920
Sale          455                  11.6015
Sale          59                   11.3755
Sale          500                  11.4000
Sale          1,000                11.4000
Sale          246                  11.6535

(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         11328                 11.5066
CFD        Short         1910                  11.5421
CFD        Short         1168                  11.561
CFD        Short         4200                  11.5818
CFD        Short         2203                  11.5864
CFD        Short         26898                 11.5865
CFD        Long          19625                 11.4807
CFD        Long          210                   11.498
CFD        Long          2712                  11.5065
CFD        Long          122832                11.5117
CFD        Long          28113                 11.5361
CFD        Long          2127                  11.579

(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                         11 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