Chorion PLC 22 February 2006 NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN OR INTO THE UNITED STATES OF AMERICA, CANADA, AUSTRALIA OR JAPAN 22 February 2006 FOR IMMEDIATE RELEASE Chorion PLC Response to Share Price Movement Following the recent movement in Chorion's share price, the Board of Chorion confirms that it is in advanced discussions, which may or may not lead to an offer for the Company. If an offer were to be forthcoming, it is expected to be at a price of 425 pence in cash per Chorion share. A further announcement will be made in due course. This announcement is issued with the consent of the potential offeror. Dealing Disclosure Requirements Under the provisions of Rule 8.3 of the City Code on Takeovers and Mergers (the "City Code"), any person who, alone or acting together with any other person(s) pursuant to an agreement or understanding (whether formal or informal) to acquire or control relevant securities of Chorion, owns or controls, or becomes the owner or controller, directly or indirectly, of one per cent or more of any class of securities of Chorion is required to disclose, by not later than 12.00 noon (London time) on the London business day following the date of the relevant transaction, dealings in such securities of that company (or in any option in respect of, or derivative referenced to, any such securities) during the period to the date on which the offer becomes or is declared unconditional as to acceptances or lapses or is otherwise withdrawn. Under the provisions of Rule 8.1 of the City Code, all dealings in relevant securities of Chorion by any of its respective "associates" (within the meaning of the City Code) must also be disclosed. If you are in any doubt as to the application of Rule 8 to you, please contact an independent financial adviser authorised under the Financial Services and Markets Act 2000, consult the Panel's website at www.thetakeoverpanel.org.uk or contact the Panel on telephone number +44 20 7638 0129; fax +44 20 7236 7013. Enquiries: Portland Tim Allan Telephone: 020 7404 5344 This information is provided by RNS The company news service from the London Stock Exchange