(19)

(11)

EP 1 971 988 A1

(12)

(43) Date of publication: 24.09.2008 Bulletin 2008/39 (21) Application number: 07704898.1 (22) Date of filing: 12.01.2007

(51) International Patent Classification (IPC):  G21F 9/00(2006.01) E04H 1/12(2006.01) (86) International application number: PCT/GB2007/000083 (87) International publication number: WO 2007/080409 (19.07.2007 Gazette 2007/29)

(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 NL PL PT RO SE SI SK TR (30) Priority: 12.01.2006 GB 0600551 29.08.2006 GB 0616945 13.09.2006 GB 0618009 (71) Applicant: Gray, Duncan Charles Kilmacolm PA13 4DQ (GB)	(72) Inventor: Gray, Duncan Charles Kilmacolm PA13 4DQ (GB) (74) Representative: Thomson, Craig Richard et al Murgitroyd & Company Scotland House 165-169 Scotland Street Glasgow G5 8PL Glasgow G5 8PL (GB)