Director/PDMR Shareholding

Centrica PLC
                  

                           Centrica plc (the Company)

                           Directors/PDMR shareholding

As part of the Company's twice annual allocations under its Long Term Incentive
Scheme (LTIS), on 1 September 2008, a conditional allocation of ordinary shares
of 6 14/81 pence each in the Company was made by the trustee to a number of
employees including Mark Hanafin:

-0-
*T
                               TSR shares       EPS shares   Total number of shares
                                                                    in conditional
                                                                         allocation
----------------------- ----------------- ---------------- ------------------------
Mark Hanafin                      165,754          165,754                  331,508
----------------------- ----------------- ---------------- ------------------------
*T

Following this allocation Mr Hanafin has an interest over 331,508 ordinary
shares in the issued share capital of the Company.

The allocation price for calculating the number of shares was 319.75p, being the
average closing share price over the five business days immediately preceding
the allocation date of 1 September 2008.

The conditional allocations shown above represent the maximum potential award
possible if all performance criteria are met at the end of the three-year
performance period. If and to the extent that the performance criteria are
satisfied at the conclusion of the performance period, the relevant number of
shares will be transferred to Mr Hanafin at the trustee's discretion.

The percentage of the allocation eventually to vest is dependent on the
satisfaction of performance criteria over a three-year performance period
commencing on 1 September 2008.

The total number of Centrica shares in issue as at the end of 1 September 2008
is 3,711,065,335.

Enquiries:

Centrica Media Relations: 0845 072 8001

Centrica Investor Relations: 01753 494900

Notes: Performance criteria

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*T
50 % on EPS* against RPI growth       Full vesting for EPS* growth exceeding RPI
                                       growth by 30%. Zero vesting if EPS* growth
                                       fails to exceed RPI growth by 9%. Vesting
                                       will increase on a straight-line basis
                                       between 25% and 100% if EPS* growth exceeds
                                       RPI growth by between 9% and 30%.
------------------------------------- ---------------------------------------------
50 % on TSR against FTSE 100**        Full vesting for upper quintile ranking. Zero
                                       vesting for sub-median ranking. Vesting will
                                       increase on a straight-line basis between
                                       25% and 100% for ranking between median and
                                       upper quintile.
------------------------------------- ---------------------------------------------
*T

* EPS is calculated as the Company's earnings per share, adjusted for
exceptional items and certain re-measurements arising on the application of IAS
32 and IAS 39.

** The Remuneration Committee determined that, for that part of the LTIS subject
to the comparative TSR performance conditions, the most appropriate comparator
group for the Company is the companies comprising the FTSE 100 at the start of
the relevant performance period (the LTIS comparator group).