Transaction in Own Shares

London Security PLC
19 May 2004


LONDON SECURITY PLC (the 'Company')

19 MAY 2004

PURCHASE OF OWN SECURITIES

London Security plc announces that on 17 May 2004 the Company purchased for
cancellation 1,500 ordinary shares of 10p each at a price of 1350p per share.

The issued share capital of the Company is now 14,465,816 ordinary shares.


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