(19)

(11)

EP 2 084 331 A1

(12)

(43) Date of publication: 05.08.2009 Bulletin 2009/32 (21) Application number: 07824273.2 (22) Date of filing: 22.10.2007

(51) International Patent Classification (IPC):  E02D 5/34(2006.01) (86) International application number: PCT/GB2007/004024 (87) International publication number: WO 2008/047151 (24.04.2008 Gazette 2008/17)

(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 LV MC MT NL PL PT RO SE SI SK TR (30) Priority: 20.10.2006 GB 0621013 (71) Applicant: City University London EC1V 0HB (GB)	(72) Inventors: McNAMARA, Andrew Martin London EC1V 0HB (GB) STALLEBRASS, Sarah Elizabeth London EC1V 0HB (GB) TAYLOR, Richard Neil London EC1V 0HB (GB) (74) Representative: Milhench, Mark Lorne et al First Thought IP 35 New Broad Street House New Broad Street London EC2M 1NH London EC2M 1NH (GB)