(19)

(11)

EP 1 198 791 A1

(12)

(43) Date of publication: 24.04.2002 Bulletin 2002/17 (21) Application number: 00942297.3 (22) Date of filing: 07.07.2000

(51) International Patent Classification (IPC)7: G08C 15/06 (86) International application number: PCT/GB0002/609 (87) International publication number: WO 0104/861 (18.01.2001 Gazette 2001/03)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 09.07.1999 GB 9916000 (71) Applicant: THE VICTORIA UNIVERSITY OF MANCHESTER Manchester M13 9PL (GB)	(72) Inventor: LLOYD, Christopher James Fallowfield,Manchester M15 6UE (GB) (74) Representative: Roberts, Peter David et al Marks & Clerk,Sussex House,83-85 Mosley Street Manchester M2 3LG Manchester M2 3LG (GB)