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 May 2006 that:

(1) The following Directors and other Persons Discharging Managerial
Responsibility for the Company acquired Shares under the SIP on 19 May 2006 held
through the Trustee:
                                Number                   Aggregate Shares held
                                of Shares                Beneficially (across all accounts
Directors                       Acquired(a)              following acquisition)
Phil Bentley                    68                       444,397
Mark Clare                      68                       906,871
Sir Roy Gardner                 68                       2,176,216
Jake Ulrich                     68                       709,980

Persons Discharging Managerial
 Responsibility
Grant Dawson                    68                       383,974
Anne Minto                      68                       106,584
Chris Weston                    51                       66,682

(a) The 'Number of Shares Acquired' includes 48 Partnership shares (except for
Chris Weston which includes 34 Partnership shares) acquired at 262.25 pence and
20 Matching shares (except for Chris Weston which includes 17 Matching shares)
acquired at 275.75 pence. Both Partnership and Matching elements are registered
in the name of the Trustee.

(2) They had transferred 13,107 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 May's allocation of Matching shares. The Directors
listed above, together with some 5,304 other employees, are participants in the
Plan and are potentially interested in the remaining 1,332 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.