(19)

(11)

EP 1 516 090 A1

(12)

(43) Date of publication: 23.03.2005 Bulletin 2005/12 (21) Application number: 03760793.4 (22) Date of filing: 13.06.2003

(51) International Patent Classification (IPC)7: E01B 3/16 (86) International application number: PCT/GB2003/002569 (87) International publication number: WO 2004/001135 (31.12.2003 Gazette 2004/01)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 21.06.2002 GB 0214319 (71) Applicant: Corus UK Limited London SW1P 4WY (GB)	(72) Inventors: FARRINGTON, David Penrith CA10 3AS (GB) CLAGUE, David Workington CA14 3LY (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)