Blocklisting Interim Review

RNS Number:4188K
Cambridge Antibody Tech Group PLC
31 March 2005

                                   SCHEDULE 5

                        BLOCKLISTING SIX MONTHLY RETURN



1. Name of company

   Cambridge Antibody Technology Group plc


2. Name of scheme

   Share Incentive Plan (formerly All Employee Share Ownership Plan)


3. Period of return:     From     1 October 2004       to 31 March 2005


4. Number and class of shares(s)
   (amount of stock/debt security)
   not issued under scheme

   291,352 (76,795 plus 214,557 additional blocklisted on 27 January 2005)


5. Number of shares issued/allotted
   under scheme during period

   109,450


6. Balance under scheme not yet issued/allotted
   at end of period

   181,902


7. Number and class of share(s)
   (amount of stock/debt securities)
   originally listed and the date of admission


Please confirm total number of shares in issue at the end of the period
in order for us to update our records

51,609,987


Contact for queries:

Name:           Justin Hoskins

Address:        Cambridge Antibody Technology
                Milstein Building
                Granta Park
                Cambridge  CB1 6GH

Telephone:      [phone]



                      This information is provided by RNS
            The company news service from the London Stock Exchange
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