(19)

(11)

EP 0 822 975 A1

(12)

(43) Date of publication: 11.02.1998 Bulletin 1998/07 (21) Application number: 96911051.0 (22) Date of filing: 24.04.1996

(51) International Patent Classification (IPC):  C12C 3/ 12( . ) (86) International application number: PCT/GB1996/000993 (87) International publication number: WO 1996/034086 (31.10.1996 Gazette 1996/48)

(84) Designated Contracting States: AT BE DE DK ES FI FR GB NL PT SE (30) Priority: 26.04.1995 GB 19950008460 (71) Applicant: Wigan Products Limited Nr. Tenbury Wells, Worcestershire WR15 8JJ (GB)	(72) Inventors: COMBES, Peter Worcestershire WR15 8JJ (GB) WESTWOOD, Keith Worcestershire WR15 8JJ (GB) PARKER, Graham Worcestershire WR15 8JJ (GB) (74) Representative: Hucker, Charlotte Jane  Gill Jennings & Every Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)