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               15 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     196,517,028     5.29%      5,129,986     0.14%
securities
(2) Derivatives   23,558,272     0.63%      1,393,248     0.04%
(other than
options)
(3) Options and      977,237     0.03%              0     0.00%
agreements to
purchase/sell
Total            221,052,537     5.95%      6,523,234     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           3,200               2.3579
Purchase           52,786              2.3551
Purchase           4,269               2.5225
Purchase           11,500              2.3450
Purchase           195,894             2.3000
Purchase           248,986             Transfer
Purchase           36,477              2.3000
Purchase           1,827,912           Transfer
Purchase           104,967             2.3500
Purchase           115,668             2.4315
Purchase           4,200               2.3538
Purchase           3,037               Transfer
Purchase           1,350               Transfer
Purchase           7,500               2.3450
Purchase           6,075               Transfer
Purchase           13,437              2.3400
Purchase           420,000             2.4423
Purchase           71,738              2.3681
Purchase           397,332             2.3595
Purchase           132,400             2.3000
Purchase           53,000              2.3000
Purchase           3,562               Transfer
Purchase           302,726             2.3400
Purchase           66,357              2.4994
Purchase           52,501              2.3000
Purchase           5,062               Transfer
Purchase           208,677             2.3400
Purchase           10,506              2.4948
Purchase           114,975             1.6000
Purchase           86,300              2.3000
Sale               37,145              2.3400
Sale               63,872              2.3700
Sale               269,273             2.3516
Sale               9,240               2.3704
Sale               29,051              2.3561
Sale               329,948             2.3400
Sale               28,235              2.3561
Sale               512,106             2.3400
Sale               62,013              2.3524
Sale               18,955              2.3538
Sale               31,500              2.3512
Sale               327,380             2.3774
Sale               13,230              2.3556
Sale               5,500               2.3430

(b)  Derivatives transactions (other than options)
Product name,  Long/Short      Number of       Price per
(e.g. CFD)     (Note 6)        Securities      unit (GBP)
CFD            Long            512106          2.3399
CFD            Long            4568            2.3448
CFD            Long            31500           2.3511
CFD            Long            264705          2.3517
CFD            Long            62013           2.3524
CFD            Long            18955           2.3538
CFD            Long            63872           2.37
CFD            Long            9240            2.3704
CFD            Long            327380          2.3774
CFD            Short           52786           2.3551
CFD            Short           3200            2.3578
CFD            Short           397332          2.3594
CFD            Short           71738           2.368
CFD            Short           115668          2.4315

(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                         16 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