REG-Centrica PLC Rule 2.10 Announcement

LONDON--(Business Wire)--

5 January 2009

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 2 January 2009, it had
5,107,723,040 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

Centrica PLC

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