(19)

(11)

EP 1 080 283 A1

(12)

(43) Date of publication: 07.03.2001 Bulletin 2001/10 (21) Application number: 99922261.5 (22) Date of filing: 17.05.1999

(51) International Patent Classification (IPC)7: E04G 21/12, E04G 17/06 (86) International application number: PCT/GB9901/360 (87) International publication number: WO 9960/229 (25.11.1999 Gazette 1999/47)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 18.05.1998 GB 9810569 (71) Applicant: Forsite Manufacturing Limited Shepperton,Middlesex TW17 ONF (GB)	(72) Inventors: BROWN, Derek,Forsite Man. Ltd. Shepperton,MiddlesexTW17 0NF (GB) HUGHES, Steven,Forsite Man. Ltd Shepperton,Middlesex TW17 0NF (GB) (74) Representative: Harrison Goddard Foote  Tower House,Merrion Way Leeds LS2 8PA Leeds LS2 8PA (GB)