Transaction in Own Shares

London Security PLC ('the Company')

20 December 2011

Transaction in own shares

London Security plc announces that on 19 December 2011 it purchased 100 ordinary shares of 1 pence each ('Ordinary Shares') in the Company for cancellation at a price of 1825 pence per share.

The purchase equates to approximately 0.001% of the issued share capital at that time.

Following this cancellation of shares, the Company's total shares in issue is 12,261,761.

For further information, please contact:

London Security plc

Richard Pollard 01422 372852

Brewin Dolphin

Sandy Fraser/ Joe Stroud 0845 213 4730