(19)

(11)

EP 0 916 124 A1

(12)

(43) Date of publication: 19.05.1999 Bulletin 1999/20 (21) Application number: 97934656.0 (22) Date of filing: 05.08.1997

(51) International Patent Classification (IPC):  G08B 13/ 14( . ) (86) International application number: PCT/GB1997/002112 (87) International publication number: WO 1998/006072 (12.02.1998 Gazette 1998/06)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 05.08.1996 GB 19960016462 05.08.1996 GB 19960016465 (71) Applicant: Dashcrown Limited Iver, Buckinghamshire SL0 9PP (GB)	(72) Inventor: HENDERSON, Philip, James Surrey KT20 5LA (GB) (74) Representative: McLeish, Nicholas Alistair Maxwell, et al  Boult Wade Tennant 27 Furnival Street London EC4A 1PQ London EC4A 1PQ (GB)