Rule 2.10 Announcement

28 January 2005

Serco Group plc

RULE 2.10 ANNOUNCEMENT

In accordance with Rule 2.10 of the City Code on Takeovers and Mergers, Serco
Group plc ('Serco') confirms that its current issued share capital comprises
435,385,996 ordinary shares of 2p each.

The International Securities Identification Number of Serco ordinary shares is
GB0007973794.

End

Contact Francesca Todd - 01256 745900