(19)

(11)

EP 0 773 718 A1

(12)

(43) Date of publication: 21.05.1997 Bulletin 1997/21 (21) Application number: 95927860.0 (22) Date of filing: 04.08.1995

(51) International Patent Classification (IPC):  A01N 37/ 16( . ) A01N 59/ 02( . ) A01N 59/ 14( . ) A01N 59/ 00( . ) A01N 59/ 12( . ) A01N 59/ 24( . ) (86) International application number: PCT/GB1995/001865 (87) International publication number: WO 1996/003873 (15.02.1996 Gazette 1996/08)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU NL PT SE Designated Extension States: LT LV SI (30) Priority: 05.08.1994 GB 19940015906 (71) Applicant: WARWICK INTERNATIONAL GROUP LIMITED Holywell, Clwyd CH8 9HE (GB)	(72) Inventors: CROUD, Vincent, Brian Holywell Clwyd CH8 7HZ (GB) TOMPSETT, Stephen, James 5 Lower Bonc Terrace Trelanwnyd Nr Rhyl Clwyd (GB) (74) Representative: Jones, Helen Marjorie Meredith  Gill Jennings & Every, Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)