Director/PDMR Shareholding

Centrica PLC
                  

Purchase of ordinary shares of 6 14 out of 8181 pence in Centrica plc ('Shares'
and the 'Company', respectively) by Directors of the Company under its Share
Incentive Plan ('SIP').

The SIP trustee, Hill Samuel ESOP Trustees Limited (the 'Trustee'), notified the
Company on 22 August 2005 that:

(1) The following Directors and other Persons Discharging Managerial
Responsibility of the Company acquired Shares under the SIP on 19 August 2005
held through the Trustee:

                                Number                   Aggregate Shares held
                                of Shares                Beneficially (across all accounts
Directors                       Acquired*                following acquisition)
Phil Bentley                    73                       257,819
Mark Clare                      73                       705,874
Sir Roy Gardner                 73                       2,175,606
Jake Ulrich                     73                       594,265

Persons Discharging Managerial
 Responsibility
Grant Dawson                    73                       280,083
Anne Minto                      73                       42,926
Chris Weston                    57                       1,940


* The 'Number of Shares Acquired' includes 53 Partnership shares (except for
Chris Weston which includes 38 Partnership shares) acquired at 238.5 pence and
20 Matching shares acquired at 237.08 pence. Both Partnership and Matching
elements are registered in the name of the Trustee.

(2) They had transferred 11,781 ordinary shares of 6 14/81 pence each from
Lloyds TSB Registrars Corporate Nominee Limited AESOP1 (Allocated shares) to
Lloyds TSB Registrars Corporate Nominee Limited AESOP2 (Unallocated shares). The
transfer was made following the forfeiture of shares, under the rules of the
SIP, by participants who have left the group since the last purchase and the
shares had been used towards August's allocation of Matching shares. The
Directors listed above, together with some 5,406 other employees, are potential
participants in the Plan and are to be treated as interested in the remaining
337 shares held by Lloyds TSB Registrars Corporate Nominee Limited AESOP2 left
following the purchase.

The SIP operates as follows

--  Each month the Trustee uses participants' contributions (which may not
    exceed £125 per participant per month) to purchase shares in the market.
    These shares are called 'Partnership Shares'.

--  At the same time the Company allots to participants via the Trustee one
    'Matching Share' for every two partnership shares purchased that month (up
    to a maximum of 20 matching shares per month).

--  Participants may change their monthly savings rate whenever they wish.
    However, Directors and others bound by the Company's Securities Dealing Code
    (the 'Code') may not make such a change during a close period or when
    otherwise prohibited from dealing by the Code.