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               10 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     182,451,345     4.91%     81,173,676     2.19%
securities
(2) Derivatives  101,058,808     2.72%      3,054,646     0.08%
(other than
options)
(3) Options and      977,237     0.03%              0     0.00%
agreements to
purchase/sell
Total            284,487,390     7.66%     84,228,322     2.27%


(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           26,110              2.3454
Purchase           139,876             2.4000
Purchase           443,755             2.4000
Purchase           165,878             2.4000
Purchase           4,812               2.3957
Purchase           5,313               2.4000
Purchase           76,600              2.3535
Purchase           226,563             2.3842
Purchase           448,798             2.3726
Purchase           79,359              2.3454
Purchase           165,878             2.4000
Purchase           346,886             2.3566
Purchase           443,755             2.4000
Purchase           20,000              2.3904
Purchase           69,067              2.3447
Purchase           8,915               2.3323
Purchase           23,827              2.3454
Purchase           16,680              2.3291
Purchase           110,100             2.3535
Purchase           262,630             2.3566
Purchase           14,804              2.3454
Purchase           200                 2.3750
Purchase           209,966             2.3643
Purchase           66,348              2.3627
Purchase           75,577              2.4000
Purchase           4,368               2.3958
Purchase           2,535               2.3958
Purchase           2,904               2.3419
Purchase           34,152              2.4000
Purchase           19,485              2.3957
Purchase           6,349               2.4000
Purchase           11,688              2.3907
Purchase           5,136               2.3504
Purchase           2,606               2.3958
Purchase           26,430              2.4000
Purchase           6,645               2.4000
Purchase           5,204               2.3957
Purchase           4,987               2.3956
Purchase           8,884               2.3957
Purchase           2,059               2.3959
Purchase           6,934               2.3957
Purchase           2,292               2.3958
Sale               7,613               2.3297
Sale               22,907              2.3365
Sale               1,805,667           2.3483
Sale               14,617              2.3522
Sale               57,375              2.3349
Sale               5,489               2.3602
Sale               99,677              2.3250
Sale               34,409              2.3483
Sale               132,409             2.3280
Sale               443,755             2.4000
Sale               165,878             2.4000
Sale               23,335              2.3417
Sale               67,454              2.3417
Sale               443,755             2.4000
Sale               3,901,814           2.3581
Sale               181,750             2.3280
Sale               200                 2.3750
Sale               76,321              2.3575
Sale               3,658               2.3374
Sale               165,878             2.4000
Sale               1,500               Transfer
Sale               659,686             2.3574
Sale               253,226             2.4000
Sale               86,573              2.3575
Sale               349,500             2.3708

(b)  Derivatives transactions (other than options)
Product name,  Long/Short      Number of       Price per
(e.g. CFD)     (Note 6)        Securities      unit (GBP)
CFD            Long            7613            2.3296
CFD            Long            57375           2.3349
CFD            Long            22907           2.3365
CFD            Long            3658            2.3373
CFD            Long            1805667         2.3483
CFD            Long            14617           2.3522
CFD            Long            659686          2.3573
CFD            Long            3901814         2.3581
CFD            Long            5489            2.3601
CFD            Long            349500          2.3708
CFD            Long            200             2.375
CFD            Short           25106           2.3043
CFD            Short           16680           2.3291
CFD            Short           8915            2.3323
CFD            Short           69067           2.3446
CFD            Short           26110           2.3454
CFD            Short           695108          2.3602
CFD            Short           209966          2.3643
CFD            Short           448798          2.3726
CFD            Short           200             2.375
CFD            Short           226563          2.3841
CFD            Short           20000           2.3903


(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                         11 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 CFD's), 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