Over-Allotment Option

Cambridge Antibody Tech Group PLC
7 April 2000


CAMBRIDGE ANTIBODY TECHNOLOGY GROUP PLC ('CAT')

EXERCISE OF OVER ALLOTMENT OPTION

Deutsche Bank AG London announces that it has partially
exercised the Over-Allotment Option referred to in the
Prospectus relating to the Open Offer and International
Offering of Ordinary Shares in CAT, dated 7 March 2000
and that the stabilisation period has now closed.  There
will be no further exercise of the Over-Allotment Option.

Pursuant to the partial exercise of the Over-Allotment
Option, CAT will issue a further 145,667  New Ordinary
Shares.

For further information contact Tom Kennedy on 020 7545
6298.

From: Deutsche Bank AG London