(19)

(11)

EP 2 480 723 A1

(12)

(43) Date of publication: 01.08.2012 Bulletin 2012/31 (21) Application number: 10754973.5 (22) Date of filing: 06.09.2010

(51) International Patent Classification (IPC):  E01F 9/011(2006.01) (86) International application number: PCT/GB2010/001686 (87) International publication number: WO 2011/036432 (31.03.2011 Gazette 2011/13)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 25.09.2009 GB 0916923 (71) Applicant: Crown UK Limited Bristol BS20 7BX (GB)	(72) Inventors: HARRIS, Steven Bristol BS6 7EY (GB) JEFFERIES, Spencer Bristol BS5 8SL (GB) SAPAK, Joe Bristol BS20 7AZ (GB) (74) Representative: Johnson, Richard Alan et al Mewburn Ellis LLP 33 Gutter Lane GB-London EC2V 8AS GB-London EC2V 8AS (GB)