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 20 October 2006 that:

(1) The following Directors and other Persons Discharging Managerial
Responsibility for the Company acquired Shares under the SIP on 19 October 2006
held through the Trustee:

-0-
*T
                                Number                   Aggregate Shares held
                                of Shares                Beneficially (across all accounts
Directors                       Acquired(a)              following acquisition)
Phil Bentley                    57                       456,657
Jake Ulrich                     57                       719,200

Persons Discharging Managerial
 Responsibility
Grant Dawson                    57                       219,373
Anne Minto                      57                       115,790
Chris Weston                    40                       75,732
*T

(a) The 'Number of Shares Acquired' includes 38 Partnership shares (except for
Chris Weston which includes 27 Partnership shares) acquired at 330.5 pence per
share and 19 Matching shares (except for Chris Weston which includes 13 Matching
shares) acquired at 329.50 pence per share. Both Partnership and Matching
elements are registered in the name of the Trustee.

(2) They had transferred 10,683 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 October's allocation of Matching shares. The
Directors listed above, together with some 5,422 other employees, are
participants in the Plan and are potentially interested in the remaining 2,359
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.