(19)

(11)

EP 2 491 188 A2

(12)

(88) Date of publication A3: 18.08.2011 (43) Date of publication: 29.08.2012 Bulletin 2012/35 (21) Application number: 10801220.4 (22) Date of filing: 25.10.2010

(51) International Patent Classification (IPC):  E03B 11/02(2006.01) (86) International application number: PCT/GB2010/051786 (87) International publication number: WO 2011/048432 (28.04.2011 Gazette 2011/17)

(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 RS SE SI SK SM TR (30) Priority: 23.10.2009 GB 0918599 (71) Applicant: NU-Sustainable Limited Northamptonshire NN8 4RQ (GB)	(72) Inventor: ASKEW, Dean Hertfordshire HP23 6EH (GB) (74) Representative: Davies, Elliott  Chapman Molony Cardiff Business Techn. Centre Senghennydd Road Cardiff CF24 4AY Cardiff CF24 4AY (GB)