CRX.L Regulatory News (CRX)

3 Mar 2010 10:06

FORM 8.3 DEALINGS BY PERSONS WITH INTERESTS IN SECURITIES REPRESENTING 1% OR MORE (Rule 8.3 of the Takeover Code)

1. KEY INFORMATION

Name of person dealing (Note 1) R E Sneller Company dealt in Cyprotex Class of relevant security to Ord 0.1p share

which the dealings being disclosed relate (Note 2) Date of dealing 02/03/2010

2. INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE

(a) Interests and short positions (following dealing) in the class of relevantsecurity dealt in (Note 3) Long Short Number (%) Number (%) (1) Relevant securities 6,500,000 (3.63%) (2) Derivatives (other than options) (3) Options and agreements to purchase/sell Total 6,500,000 (3.63%)

(b) Interests and short positions in relevant securities of the company, other than the class dealt in (Note 3)

Class of relevant security: Long Short Number (%) Number (%) (1) Relevant securities (2) Derivatives (other than options)

(3) Options and agreements to purchase/sell Total

(c) Rights to subscribe (Note 3)

Class of relevant security: Details 3. DEALINGS (Note 4)(a) Purchases and salesPurchase/sale Number of securities Price per unit (Note 5) Purchase 500,000 3.75p

(b) Derivatives transactions (other than options)

Product name, Long/short (Note Number of securities Price per unit (Note 6) (Note 7) 5) e.g. CFD

(c) Options transactions in respect of existing securities

(i) Writing, selling, purchasing or varying

Product name, Writing, Number of Exercise Type, e.g. Expiry Option

selling, securities to American, money e.g. call purchasing, which the price European date option varying option etc. paid/ etc. relates (Note received 7) per unit (Note 5) (ii) ExercisingProduct name, e.g. call Number of securities Exercise price per unit option (Note 5)

(d) Other dealings (including new securities) (Note 4)

Nature of transaction Details Price per unit (if (Note 8) applicable) (Note 5) 4. OTHER INFORMATION

Agreements, arrangements or understandings relating to options or derivatives

Full details of any agreement, arrangement or understanding between the person disclosing and any other person relating to the voting rights of any relevant securities under any option referred to on this form or relating to the voting rights or future acquisition or disposal of any relevant securities to which any derivative referred to on this form is referenced. If none, this should be stated.

Is a Supplemental Form 8 attached? (Note 9) YES/NO

Date of disclosure 03/03/2010 Contact name R E Sneller Telephone number 0131-275-2198

If a connected EFM, name of offeree/offeror with which connected If a connected EFM, state nature of connection (Note 10)

Notes

The Notes on Form 8.3 can be viewed on the Takeover Panel's website at www.thetakeoverpanel.org.uk