Director/PDMR Shareholding

Centrica PLC
                  

Allotment of ordinary shares of 6 14/81 pence in Centrica plc ('Shares' and the
'Company', respectively) by a Person Discharging Managerial Responsibility
(PDMR) of the Company under its North American Employee Share Purchase Plan
('NAESPP').

The Bank of New York, (the 'Administrator'), notified the Company on 10 August
2007 that the following shares were required to meet the Matching element on the
Partnership Shares acquired by Deryk King on 8 August 2005. The shares were
allotted on 8 August 2007 and are held by the Administrator on behalf of Mr
King:

-0-
*T
                                 Number                    Aggregate Shares held
                                 of Matching               Beneficially (across all accounts
                                 Shares allotted*          following allotment)
Persons Discharging Managerial
Responsibility
Deryk King                       123.77004                 274,145.69972
*T

* The 'Number of Matching Shares allotted' were at a price of 360 pence per
share.

The NAESPP operates as follows

    --  Each month the Administrator uses participants' contributions (which are
        from 1% to 5% of base salary but may not exceed $10,000 per participant
        per year) to purchase shares in the market. These shares are called
        'Partnership Shares'. Participants may hold both fractional and whole
        Partnership Shares.

    --  For every two Partnership Shares the participants still own after two
        years, the Company awards one free share. These are called 'Matching
        Shares'.

    --  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.

    --  The NAESPP is only open to employees of the Company based in Canada and
        the United States. No other Directors or PDMRs of the Company are
        participants in the NAESPP.