Holding(s) in Company

Cambridge Antibody Tech Group PLC
30 June 2004


                                  SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES


1)   Name of company


Cambridge Antibody Technology Group plc


2)   Name of shareholder having a major interest


Human Genome Sciences Inc


3)   Please state whether notification indicates that it is in respect of
     holding of the shareholder named in 2 above or in respect of a
     non-beneficial interest or in the case of an individual holder if it is a
     holding of that person's spouse or children under the age of 18


As in 2 above


4)   Name of the registered holder(s) and, if more than one holder, the
     number of shares held by each of them


Not disclosed


5)   Number of shares/amount of stock acquired


n/a


6)   Percentage of issued class


n/a


7)   Number of shares/amount of stock disposed


Not disclosed


8)   Percentage of issued class


Not disclosed


9)   Class of security


Ordinary 10 pence shares


10)  Date of transaction


Not disclosed


11)  Date company informed


30 June 2004


12)  Total holding following this notification


Not disclosed



13)  Total percentage holding of issued class following this notification


Not disclosed


14)  Any additional information


Human Genome Sciences Inc have notified the Company that their interest in the
CompanyOs securities has fallen below 3% and that they therefore do not have a
notifiable interest under sections 198-204 of the Companies Act 1985.


15)  Name of contact and telephone number for queries


Justin Hoskins    01223 898589


16)  Name and signature of authorised company official responsible for
     making this notification



Diane Mellett, Company Secretary

Date of notification  30 June 2004





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