Rule 8.3 - CENTRICA

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              CENTRICA
Class of relevant security    ORD GBP0.061728395
to which the dealings being
disclosed relate (Note 2)
Date of dealing               12 December 2008

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     181,018,372     4.87%      5,146,436     0.14%
securities
(2) Derivatives   23,039,747     0.62%      1,528,338     0.04%
(other than
options)
(3) Options and      977,237     0.03%              0     0.00%
agreements to
purchase/sell
Total            205,035,356     5.52%      6,674,774     0.18%


(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           Price per unit
                   Securities          (GBP)
Purchase           16,808              2.4848
Purchase           4,169               1.5999
Purchase           7,040               2.5212
Purchase           4,562               1.6000
Purchase           534                 Transfer
Purchase           12,954              2.5225
Purchase           36,233              2.4933
Purchase           130,976             1.6000
Purchase           2,862               1.6000
Purchase           15,391              2.5008
Purchase           10,954              2.5225
Purchase           44,150              1.6000
Purchase           9,490               2.5225
Purchase           5,314               2.5225
Purchase           12,953              2.5225
Purchase           3,224               2.5225
Purchase           2,215               2.5225
Purchase           40,390              2.5186
Purchase           20,195              2.5225
Purchase           4,604               2.4450
Sale               92,808              2.5040
Sale               1,500               2.4887
Sale               8,631               2.5063
Sale               28,783              2.4970
Sale               475,245             2.4879
Sale               27,485              2.5105
Sale               4,050               2.4530
Sale               685,821             2.4915
Sale               487,528             2.4954
Sale               5,000               2.4847
Sale               1,140               Transfer

(b)  Derivatives transactions (other than options)
Product name,  Long/Short      Number of       Price per
(e.g. CFD)     (Note 6)        Securities      unit (GBP)
CFD            Long            5000            2.4846
CFD            Long            1500            2.4886
CFD            Long            685821          2.4915
CFD            Long            487528          2.4954
CFD            Long            28783           2.4969
CFD            Long            92808           2.5039
CFD            Long            8631            2.5062
CFD            Long            27485           2.5105
CFD            Short           79270665        1.6
CFD            Short           16808           2.4847
CFD            Short           36233           2.4933
CFD            Short           15391           2.5008
CFD            Short           534609          2.5062
CFD            Short           8631            2.5063
CFD            Short           7040            2.5212
CFD            Short           129021          2.5217
CFD            Short           69937           2.5226

(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)                 YES


Date of disclosure                         15 December 2008
Contact name                               Geoff Smith
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)

SUPPLEMENTAL FORM 8

DETAILS OF OPEN POSITIONS
(This form should be attached to Form 8.1, Form 8.1(b)(ii) or Form 8.3, as appropriate)

OPEN POSITIONS (Note 1)
Product name,      Written or   Number of securities    Exercise price   Type, e.g.     Expiry date
e.g. call option   purchased    to which the option     (Note 2)         American,
                                or derivative relates                    European etc.
Option             Purchased    977,237                 3.5881           EURO           18/12/2008

Notes

1. Where there are open option positions or open derivative positions (except for CFDs), full details should be given.
Full details of any  existing agreements to purchase or to sell  should also be given on this form.

2. For all prices and other monetary amounts, the currency must be stated.

For details of the Code's dealing disclosure requirements, see Rule 8 and its Notes which can be viewed on the Takeover
Panel's website at www.thetakeoverpanel.org.uk