Transaction in Own Shares

LONDON SECURITY PLC ("the Company")

02 June 2011

TRANSACTION IN OWN SHARES

London Security plc announces that on 02 June 2011 it purchased 3,375 ordinary shares of 1p each ('Ordinary Shares') in the Company for cancellation at a price of 1,437.5 pence per share.

The purchase equates to approximately 0.03% of the issued share capital at that time.

Following this cancellation of shares, the Company's total shares in issue is 12,264,373.

London Security plc

Richard Pollard 01422 372852

Brewin Dolphin

Sandy Fraser / Iain Marlow 0845 213 4730