End of Offer Period

Cyprotex PLC ("Cyprotex" or the "Company")

End of bid discussions

The Board of Cyprotex announced on 2 March 2010 that it had received an unsolicited approach regarding a potential offer for the Company. The Board has rejected this approach and discussions are at an end.

This announcement has been made with the agreement of the other party.

For the purposes of the Takeover Code, the Company is no longer in an Offer Period.

Enquiries:

Cyprotex PLC
Steve Harris
Tel: 016 2552 5100
ir@cyprotex.com
www.cyprotex.com

Execution Noble & Company Limited
John Llewellyn-Lloyd
Sam Reynolds
Tel: 020 7456 9191

Public Relations
Financial Dynamics
Ben Brewerton
Ben Atwell
John Dineen
Tel: 020 7831 3113