Director/PDMR Shareholding

Centrica PLC
                  

Purchase of ordinary shares of 6 14/81 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 2006 that:

(1) The following Directors and other Persons Discharging Managerial
Responsibility for the Company acquired Shares under the SIP on 21 August 2006
held through the Trustee:
                                Number                   Aggregate Shares held
                                of Shares                Beneficially (across all accounts
Directors                       Acquired*                following acquisition)
Phil Bentley                    62                       456,542
Mark Clare                      62                       107,064
Jake Ulrich                     62                       710,262

Persons Discharging Managerial
 Responsibility
Grant Dawson                    62                       384,258
Anne Minto                      62                       115,675
Chris Weston                    45                       75,649

* The 'Number of Shares Acquired' includes 42 Partnership shares (except for
Chris Weston which includes 30 Partnership shares) acquired at 296.00 pence and
20 Matching shares (except for Chris Weston which includes 15 Matching shares)
acquired at 297.33 pence. Both Partnership and Matching elements are registered
in the name of the Trustee.

(2) They had transferred 21,013 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 5,448 other employees, are
participants in the Plan and are potentially interested in the remaining 1,987
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.