(19)

(11)

EP 0 825 947 A1

(12)

(43) Date of publication: 04.03.1998 Bulletin 1998/10 (21) Application number: 96906865.0 (22) Date of filing: 18.03.1996

(51) International Patent Classification (IPC):  B63C 9/ 125( . ) (86) International application number: PCT/GB1996/000617 (87) International publication number: WO 1996/029241 (26.09.1996 Gazette 1996/43)

(84) Designated Contracting States: DE DK FR GB IT SE (30) Priority: 18.03.1995 GB 19950005504 (71) Applicant: BTR plc London SW1P 1BX (GB)	(72) Inventors: WILLIAMS, Ronald Bebington Wirral, Merseyside L63 9AJ (GB) OLIVER, James, David Wirral, Merseyside L63 5LL (GB) (74) Representative: Treves, Barry William, et al  BTR Group Intellectual Property, Knights House, 2 Parade Sutton Coldfield, West Midlands B72 1PH Sutton Coldfield, West Midlands B72 1PH (GB)