Rule 2.10 Announcement

Centrica PLC 20 August 2008 Disclosure in accordance with Rule 2.10 of the City Code In accordance with Rule 2.10 of the City Code on Takeovers and Mergers, Centrica plc confirms that at the close of business on 19 August 2008, it had 3,709,898,618 ordinary shares of 6 14/81p each in issue. The ISIN reference for the shares is GB00B033F229. Enquiries: Centrica Investor Relations: 01753 494900 Centrica Media Relations: 0845 072 8001

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Centrica (CNA)
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