(19)

(11)

EP 2 021 552 A1

(12)

(43) Date of publication: 11.02.2009 Bulletin 2009/07 (21) Application number: 07732649.4 (22) Date of filing: 02.05.2007

(51) International Patent Classification (IPC):  E04B 1/35(2006.01) (86) International application number: PCT/GB2007/001616 (87) International publication number: WO 2007/132163 (22.11.2007 Gazette 2007/47)

(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 Designated Extension States: AL BA HR MK RS (30) Priority: 11.05.2006 GB 0609281 (71) Applicant: William Hare Limited Bury BL8 1JJ (GB)	(72) Inventor: SIMMONS, Gary Bury BL8 1JJ (GB) (74) Representative: Johnson, Graham Pierssene  Appleyard Lees 15 Clare Road Halifax HX1 2HY Halifax HX1 2HY (GB)