Purchase of ordinary shares of 6 14/81 pence in Centrica plc ("Shares" and the
"Company", respectively) by Directors of the Company and Persons Discharging
Managerial Responsibility (PDMRs) under its Share Incentive Plan ("SIP").

The SIP trustee, Equiniti Share Plan Trustees Limited (the "Trustee"), notified
the Company on 20 June 2008 that:

(1) The following Directors and other Persons Discharging Managerial
Responsibility for the Company acquired Shares under the SIP on 19 June 2008
held through the Trustee:

                                 Number                    Aggregate Shares held
                                 of Shares                 Beneficially (across all accounts
Directors                        Acquired*                 following acquisition)
Phil Bentley                     60                        699,921
Sam Laidlaw                      60                        342,352
Nick Luff                        60                        200,630

Persons Discharging Managerial
 Responsibility
Jake Ulrich                      60                        919,049
Grant Dawson                     60                        331,646
Catherine May                    60                        6,556
Anne Minto                       60                        231,972
Chris Weston                     60                        153,964

* The 'Number of Shares Acquired' includes 40 Partnership shares acquired at
313.25 pence per share and 20 Matching shares acquired at 305.33 pence per
share. Both Partnership and Matching elements are registered in the name of the
Trustee.

(2) They had transferred 10,000 ordinary shares of 6 14/81 pence each from
Equiniti Corporate Nominees Limited AESOP1 (Allocated shares) to Equiniti
Corporate Nominees 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 June's allocation of Matching shares. The Directors and PDMRs listed
above, together with some 5,107 other employees, are participants in the SIP and
are potentially interested in the remaining 6,261 shares held by Equiniti
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.

Julia Foo
Centrica plc
01753 494016

Copyright Business Wire 2008