(19)

(11)

EP 1 397 562 A1

(12)

(43) Date of publication: 17.03.2004 Bulletin 2004/12 (21) Application number: 02730439.3 (22) Date of filing: 06.06.2002

(51) International Patent Classification (IPC)7: E02D 27/50, E02D 27/42, E02D 5/80 (86) International application number: PCT/GB2002/002395 (87) International publication number: WO 2002/099204 (12.12.2002 Gazette 2002/50)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 06.06.2001 GB 0113711 (71) Applicant: Corus UK LTD. London SW1P 4WY (GB)	(72) Inventor: REA, Derek, William York YO41 1NL (GB) (74) Representative: Fry, Alan Valentine et al Fry Heath & Spence LLP,The Gables,Massetts Road Horley,Surrey RH6 7DQ Horley,Surrey RH6 7DQ (GB)