(19)

(11)

EP 1 859 421 A1

(12)

(43) Date of publication: 28.11.2007 Bulletin 2007/48 (21) Application number: 06710008.1 (22) Date of filing: 06.03.2006

(51) International Patent Classification (IPC):  G08B 21/02(2006.01) (86) International application number: PCT/GB2006/000788 (87) International publication number: WO 2006/095152 (14.09.2006 Gazette 2006/37)

(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 (30) Priority: 11.03.2005 GB 0505069 (71) Applicant: Jackel International Limited Cramlington Northumberland NE23 7RH (GB)	(72) Inventors: CHI CHEUNG, Liu Tsuen Wan, Hong Kong (CN) GOOCH, David Cambridge CB2 1NZ (GB) (74) Representative: Roberts, Gwilym Vaughan et al Kilburn & Strode 20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)