(19)

(11)

EP 1 530 786 A2

(12)

(88) Date of publication A3: 08.04.2004 (43) Date of publication: 18.05.2005 Bulletin 2005/20 (21) Application number: 03792456.0 (22) Date of filing: 31.07.2003

(51) International Patent Classification (IPC)7: G08B 29/00 (86) International application number: PCT/GB2003/003323 (87) International publication number: WO 2004/019298 (04.03.2004 Gazette 2004/10)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 21.08.2002 GB 0219418 (71) Applicant: Micropack (Engineering) Limited Grampian AB11 6XY (GB)	(72) Inventor: DAVIDSON, Ian Dunklend PH8 0BW (GB) (74) Representative: Vinsome, Rex Martin  Urquhart-Dykes & Lord LLPSt Nicholas Chambers,Amen Corner Newcastle-Upon-Tyne NE1 1PE Newcastle-Upon-Tyne NE1 1PE (GB)