(19)

(11)

EP 0 426 733 A1

(12)

(43) Date of publication: 15.05.1991 Bulletin 1991/20 (21) Application number: 89908720.0 (22) Date of filing: 28.07.1989

(51) International Patent Classification (IPC):  G07G 1/ 12( . ) G06F 17/ 40( . ) G07F 7/ 00( . ) G07F 7/ 08( . ) G07G 1/ 00( . ) G06F 15/ 02( . ) G06Q 10/ 00( . ) G07F 7/ 02( . ) G07F 9/ 02( . ) (86) International application number: PCT/GB1989/000863 (87) International publication number: WO 1990/001199 (08.02.1990 Gazette 1990/04)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 28.07.1988 GB 19880017981 15.09.1988 GB 19880021657 28.09.1988 GB 19880022750 (71) Applicant: BRITISH AIRWAYS PLC Hounslow Middlesex TW6 2JA (GB)

(72) Inventors: BUCKLE, Dereck Newport Gwent NP9 6WL (GB) WHEATMAN, Gordon 59 Cross Street Abergavenny NP7 5EU (GB) AVON, Philip Nr. Usk NP9 7EH (GB) SHIER-JONES, Brian Newport Gwent NP4 4FS (GB) SHIER-JONES, Angela Newport Gwent NP4 4FS (GB) THOMAS, Sandra Newport Gwent NP9 1DN (GB) OLLEY, Michael Lydney Glos GL15 1YZ (GB) ROSS, Gary Pontypool Gwent NP4 0HZ (GB) MORRELL, Mike Hounslow Middlesex TW6 2JA (GB) MACDOUGALL, Peter Hounslow Middlesex TW6 2JA (GB) JOPLING, John Hounslow Middlesex TW6 2JA (GB) TUFFS, Gerald, Paul Usk Gwent NP44 1RJ (GB) (74) Representative: Milhench, Howard Leslie  R.G.C. Jenkins & Co. 26 Caxton Street London SW1H 0RJ London SW1H 0RJ (GB)