Ex Entitlement Details

Cambridge Antibody Tech Group PLC
8 March 2000

ENTITLEMENT ISSUE
SECURITY TITLE
*Ord Shs
MNEMONIC CODE           *CAT
SEDOL CODE              *166-225
TERMS                   *Qualifying shareholders may apply for New Ord Shs, on  
                        a pre-emptive basis, for an amount up to their          
                       respective pro rata entitlements under the Open Offer.
                         The size of the Open Offer will not be less than £40
                         million.
                         The Offer price, which will apply to all applications  
                        for New Ord Shs in the Offers, will be determined at 
                         the end of the International Offering, following a     
                        competitive book-building process. The Offer price &
                         number of New Ord Shs to be issued will be determined 
                         and announced on 03-04-00.
EX DATE                 *08-03-00
RECORD DATE             *29-02-00
SPLITTING APPLICATION FORMS *29-03-00 4.30 pm   
RECEIPT OF APPLICATION FORMS *31-03-00 4.30 pm
DEALING COMMENCE NEW SHARES *04-04-00
NOTES *