(19)

(11)

EP 0 623 234 A1

(12)

(43) Date of publication: 09.11.1994 Bulletin 1994/45 (21) Application number: 92916248.0 (22) Date of filing: 24.07.1992

(51) International Patent Classification (IPC):  G07F 9/ 00( . ) G07F 11/ 54( . ) (86) International application number: PCT/GB1992/001372 (87) International publication number: WO 1993/003463 (18.02.1993 Gazette 1993/05)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE (30) Priority: 05.08.1991 GB 19910016816 (71) Applicant: LONDON THAMES ADVEND LIMITED London W.1 (GB)	(72) Inventors: CORLEY, David Robert Bagleys Lane, London SW6 2BY (GB) JACKSON, Martin Burton London NW1 8JJ (GB) WOOD, Peter Vincent London W.1 (GB) (74) Representative: Hedley, Nicholas James Matthew  Stephenson Harwood One, St. Paul's Churchyard London EC4M 8SH London EC4M 8SH (GB)