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               11 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     179,277,437     4.83%     82,774,058     2.23%
securities
(2) Derivatives  101,291,350     2.73%      1,029,162     0.03%
(other than
options)
(3) Options and      977,237     0.03%              0     0.00%
agreements to
purchase/sell
Total            281,546,024     7.58%     83,803,220     2.26%


(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           20,778              2.4594
Purchase           9,572               2.5150
Purchase           4,786               2.5150
Purchase           39,200              2.4850
Purchase           8,529               2.4594
Purchase           8,720               2.5150
Purchase           139,876             2.5150
Purchase           66,905              2.4618
Purchase           6,704               2.4000
Purchase           63,428              2.4160
Purchase           663                 2.3995
Purchase           21,345              2.5150
Purchase           118,213             2.4594
Purchase           102,407             2.4074
Purchase           11,137              2.4594
Purchase           10,765              2.4594
Purchase           3,674               2.5194
Purchase           7,813               2.4594
Purchase           4,210               2.4594
Purchase           53,047              2.4414
Purchase           12,568              2.5150
Purchase           22,280              2.5150
Purchase           424,136             2.4594
Purchase           120,600             2.4594
Purchase           24,219              2.4594
Purchase           22                  2.4925
Sale               471,070             2.5151
Sale               120,791             2.5150
Sale               3,200               2.5043
Sale               54,190              2.4513
Sale               19,342              2.4594
Sale               426,649             2.4598
Sale               1,703,961           2.4491
Sale               45,000              2.4792
Sale               222,489             2.4321
Sale               433,678             2.4597
Sale               22                  2.4927
Sale               3,674               2.5194
Sale               58,808              2.4355
Sale               546,538             2.4612

(b)  Derivatives transactions (other than options)
Product name,  Long/Short      Number of       Price per
(e.g. CFD)     (Note 6)        Securities      unit (GBP)
CFD            Long            222489          2.432
CFD            Long            58808           2.4355
CFD            Long            1703961         2.449
CFD            Long            54190           2.4512
CFD            Long            19342           2.4593
CFD            Long            433678          2.4597
CFD            Long            426649          2.4598
CFD            Long            546538          2.4612
CFD            Long            45000           2.4792
CFD            Long            22              2.4927
CFD            Long            3200            2.5043
CFD            Long            3674            2.5193
CFD            Short           52791           2.4058
CFD            Short           102407          2.4074
CFD            Short           36347           2.4095
CFD            Short           168226          2.4104
CFD            Short           63428           2.416
CFD            Short           53047           2.4414
CFD            Short           407587          2.4594
CFD            Short           39200           2.4849
CFD            Short           22              2.4927
CFD            Short           140699          2.5112
CFD            Short           202901          2.5129
CFD            Short           3674            2.5193

(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                         12 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