RNS Number:6982O
K.S. Biomedix Holdings PLC
14 August 2003


NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN OR INTO THE UNITED STATES OF
AMERICA, CANADA, AUSTRALIA OR JAPAN

14 August 2003

FOR IMMEDIATE RELEASE


KS Biomedix Holdings PLC ("KSB")
ISIN : GB0004796669
Relevant Securities in Issue


Further to the announcement today of a recommended offer by Nomura on behalf of
Xenova Group plc for KSB, KSB announces that the relevant securities in issue in
KSB are as follows:

Security                                                                Number

Ordinary Shares of 2 pence each                                     57,458,066
Exchangeable Shares (see note below)                                 7,119,029



Notes:

The Exchangeable Shares which have been issued by KSB's indirectly wholly owned
subsidiary, KS Biomedix Canada Inc., are exchangeable for 7,119,029 KSB Ordinary
Shares on the basis of one Ordinary Share for each Exchangeable Share.

                                      Ends


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