(19)

(11)

EP 2 064 399 A1

(12)

(43) Date of publication: 03.06.2009 Bulletin 2009/23 (21) Application number: 06820431.2 (22) Date of filing: 05.12.2006

(51) International Patent Classification (IPC):  E04G 1/34(2006.01) (86) International application number: PCT/GB2006/004548 (87) International publication number: WO 2007/135351 (29.11.2007 Gazette 2007/48)

(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 Designated Extension States: AL BA HR MK RS (30) Priority: 18.05.2006 GB 0609913 (71) Applicant: Stevens, John Timothy Abbots Ripton Huntingdon Cambridgeshire PE28 2PT (GB)	(72) Inventor: Stevens, John Timothy Abbots Ripton Huntingdon Cambridgeshire PE28 2PT (GB) (74) Representative: Oxley, Robin John George  Marks & Clerk LLP 90 Long Acre London WC2E 9RA London WC2E 9RA (GB)