(19)

(11)

EP 0 295 254 A1

(12)

(43) Date of publication: 21.12.1988 Bulletin 1988/51 (21) Application number: 87901546.0 (22) Date of filing: 20.02.1987

(51) International Patent Classification (IPC):  E02D 5/ 60( . ) E02D 31/ 06( . ) (86) International application number: PCT/GB1987/000127 (87) International publication number: WO 1987/005066 (27.08.1987 Gazette 1987/19)

(84) Designated Contracting States: BE FR GB IT NL SE (30) Priority: 20.02.1986 GB 19860004285 (71) Applicant: N.I.C.C. LIMITED Gloucestershire GL7 5SA (GB)	(72) Inventor: STRANGE, Anthony, Edward, John Nr. Malmesbury Wiltshire (GB) (74) Representative: Lainé, Simon James, et al  Wynne-Jones, Lainé & James 22, Rodney Road Cheltenham Gloucestershire GL50 1JJ Cheltenham Gloucestershire GL50 1JJ (GB)