(19)

(11)

EP 1 718 804 A2

(12)

(88) Date of publication A3: 03.11.2005 (43) Date of publication: 08.11.2006 Bulletin 2006/45 (21) Application number: 05717787.5 (22) Date of filing: 25.02.2005

(51) International Patent Classification (IPC):  E01B 23/06(2006.01) (86) International application number: PCT/GB2005/000703 (87) International publication number: WO 2005/083179 (09.09.2005 Gazette 2005/36)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR (30) Priority: 25.02.2004 GB 0404155 (71) Applicant: Scott-Track IP Limited Glasgow, G40 3PX (GB)	(72) Inventor: MCCALLUM, Donald Glasgow, G32 0SH (GB) (74) Representative: Jones, Keith William  Murgitroyd & Company Scotland House 165-169 Scotland Street Glasgow G5 8PL Glasgow G5 8PL (GB)