(19)

(11)

EP 1 499 777 A1

(12)

(43) Date of publication: 26.01.2005 Bulletin 2005/04 (21) Application number: 03747358.4 (22) Date of filing: 04.04.2003

(51) International Patent Classification (IPC)7: E01B 9/30 (86) International application number: PCT/GB2003/001480 (87) International publication number: WO 2003/093580 (13.11.2003 Gazette 2003/46)

(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: 30.04.2002 GB 0209867 (71) Applicant: PANDROL LIMITED Addlestone,Surrey KT15 2AR (GB)	(72) Inventors: MARSHALL, Barry Sheffield S17 3DG (GB) SOMERSET, Martin Worksop S80 3QX (GB) (74) Representative: Fenlon, Christine Lesley  Haseltine Lake & Co.,Imperial House,15-19 Kingsway London WC2B 6UD London WC2B 6UD (GB)