(19)

(11)

EP 2 038 861 A1

(12)

(43) Date of publication: 25.03.2009 Bulletin 2009/13 (21) Application number: 07705383.3 (22) Date of filing: 16.02.2007

(51) International Patent Classification (IPC):  G08B 21/22(2006.01) (86) International application number: PCT/GB2007/050070 (87) International publication number: WO 2007/093831 (23.08.2007 Gazette 2007/34)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 17.02.2006 GB 0603231 (71) Applicant: Active Tagging Limited Elland West Yorkshire HX5 0AE (GB)	(72) Inventors: MATHER, John Kempsford Gloucestershire GL7 4HL (GB) WILKINSON, Philip Leeds LS8 2BE (GB) (74) Representative: Harrison Goddard Foote  Belgrave Hall Belgrave Street Leeds LS2 8DD Leeds LS2 8DD (GB)