(19)

(11)

EP 1 989 367 A1

(12)

(43) Date of publication: 12.11.2008 Bulletin 2008/46 (21) Application number: 07705273.6 (22) Date of filing: 23.02.2007

(51) International Patent Classification (IPC):  E04F 11/18(2006.01) (86) International application number: PCT/GB2007/000642 (87) International publication number: WO 2007/096641 (30.08.2007 Gazette 2007/35)

(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: 23.02.2006 GB 0603645 (71) Applicant: RICHARD BURBIDGE LIMITED Oswestry Shropshire SY11 1HZ (GB)	(72) Inventors: JONES, Anthony Shropshire SY11 3DD (GB) HUGHES, Paul Powys SY22 6JX (GB) (74) Representative: Moore, Christopher Mark et al HLBBshaw Limited 1 Hagley Road 10th Floor Birmingham B16 8TG Birmingham B16 8TG (GB)