(19)

(11)

EP 0 388 405 A1

(12)

(43) Date of publication: 26.09.1990 Bulletin 1990/39 (21) Application number: 88905957.0 (22) Date of filing: 07.07.1988

(51) International Patent Classification (IPC):  E04H 1/ 12( . ) (86) International application number: PCT/GB1988/000540 (87) International publication number: WO 1989/000228 (12.01.1989 Gazette 1989/02)

(84) Designated Contracting States: AT BE CH DE FR IT LI LU NL SE (30) Priority: 07.07.1987 GB 19870015904 (71) Applicant: / ... (GB)	(72) Inventor: / ... (GB) (74) Representative: Orr, William McLean, et al  URQUHART-DYKES & LORD 5th Floor, Tower House Merrion Way Leeds West Yorkshire, LS2 8PA Leeds West Yorkshire, LS2 8PA (GB)