Rights Issue Rump Placing

Rights Issue Rump Placing

Centrica PLC

15 December 2008

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, DIRECTLY OR INDIRECTLY, IN WHOLE OR IN PART, IN OR INTO THE UNITED STATES, AUSTRALIA, CANADA, THE PEOPLE'S REPUBLIC OF CHINA, JAPAN, SINGAPORE, THE REPUBLIC OF SOUTH AFRICA OR SWITZERLAND

CENTRICA PLC - PLACING OF THE RIGHTS ISSUE RUMP

Centrica plc ('Centrica') announced earlier today that, as at 11:00am on 12 December, 2008, being the latest date for receipt of valid subscriptions, it had received valid acceptances in respect of 1,271,643,840 New Shares, representing approximately 91.30 per cent. of the total number of New Shares offered to shareholders pursuant to the 3 for 8 rights issue announced by Centrica on 31 October 2008 (the 'Rights Issue').

Centrica announces that, in accordance with the arrangements set out in Part III of the Rights Issue prospectus dated 31 October 2008 (the 'Prospectus'), Goldman Sachs International, Credit Suisse and UBS Investment Bank, acting as Joint Bookrunners, have procured acquirers for the remaining New Shares, for which valid acceptances were not received, at a price of 230 pence per share.

The net proceeds from the sale of these New Shares after deduction of the Rights Issue price of 160 pence per New Share and relevant costs (including any commissions and taxes), will, save for amounts less than £5.00, be paid without interest to Shareholders who have not taken up their entitlements, pro rata to their lapsed provisional allotments. As a result of the sale of these New Shares, neither the Underwriters nor the sub-underwriters will be required to subscribe for any New Shares.

Contacts

Centrica Investor Relations: 01753 494900

Centrica Media Relations: 0845 0726 8001

This document is not a Prospectus but an advertisement and investors should not subscribe for any Nil Paid Rights, Fully Paid Rights or New Ordinary Shares referred to in this announcement except on the basis of the information contained in the Prospectus. Definitions used in the Prospectus shall have the same meanings when used in this announcement unless the context otherwise requires.

Neither the content of Centrica plc's website nor any website accessible by hyperlinks to Centrica plc's website is incorporated in, or forms part of, this announcement.

Distribution of this announcement and/or the Provisional Allotment Letters and/or the transfer of Nil Paid Rights, Fully Paid Rights and/or New Ordinary Shares into jurisdictions other than the United Kingdom may be restricted by law. These materials are not for distribution, directly or indirectly, in whole or in part, in or into the United States (including its territories and dependencies, any state or the United States and the District of Columbia). Persons into whose possession this announcement comes should inform themselves of and observe any such restrictions. Any failure to comply with these restrictions may constitute a violation of the securities laws of any such jurisdiction.

These materials do not constitute or form a part of any offer or solicitation to purchase or subscribe for securities in the United States. The Nil Paid Rights, the Fully Paid Rights and the New Ordinary Shares have not been and will not be registered under the United States Securities Act of 1933 (the “Securities Act”) or under any securities laws of any state or other jurisdiction of the United States and may not be offered, sold, taken up, exercised, resold, renounced, transferred or delivered, directly or indirectly, within the United States except pursuant to an applicable exemption from the registration requirements of the Securities Act and in compliance with any applicable securities laws of any state or other jurisdiction of the United States. The Nil Paid Rights, the Fully Paid Rights, the New Ordinary Shares and the Provisional Allotment Letters have not been approved or disapproved by the US Securities and Exchange Commission, any state’s securities commission in the United States or any US regulatory authority, nor have any of the foregoing authorities passed upon or endorsed the merits of the offering of the Nil Paid Rights, the Fully Paid Rights, the New Shares and the Provisional Allotment Letters or the accuracy or adequacy of this announcement. There will be no public offer of these securities in the United States.

The Nil Paid Rights, the Fully Paid Rights, the Provisional Allotment Letters and the New Ordinary Shares will also not be registered under the securities laws of any Excluded Territory or Restricted Territory and may not be offered, sold, taken up, exercised, resold, renounced, transferred or delivered, directly or indirectly, within such jurisdictions except pursuant to an applicable exemption from and in compliance with any applicable securities laws. There will be no public offer in any of the Excluded Territories or the Restricted Territories.

Goldman Sachs International, Credit Suisse, UBS Limited, Barclays Capital, BNP Paribas, HSBC and RBS Hoare Govett Limited, which are authorised and regulated in the UK by the Financial Services Authority, are acting for Centrica and no one else in connection with the Rights Issue and will not regard any other person (whether or not a recipient of this document) as a client in relation to the Rights Issue and will not be responsible to anyone other than Centrica for providing the protections afforded to their respective clients or for providing advice in relation to the Rights Issue or any matters referred to in this document.