(19)

(11)

EP 1 077 860 A1

(12)

(43) Date of publication: 28.02.2001 Bulletin 2001/09 (21) Application number: 99918175.3 (22) Date of filing: 26.04.1999

(51) International Patent Classification (IPC)7: B61L 5/06, B61L 5/10 (86) International application number: PCT/GB9901/283 (87) International publication number: WO 9955/571 (04.11.1999 Gazette 1999/44)

(84) Designated Contracting States: AT CH DE ES FR GB IE IT LI NL SE (30) Priority: 24.04.1998 GB 9808900 (71) Applicant: Claverham Limited Bristol BS49 4NF (GB)	(72) Inventor: SYED, SohailClaverham Limited Bristol BS49 4NF (GB) (74) Representative: Roberts, Gwilym Vaughan et al KILBURN & STRODE,20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)