(19)

(11)

EP 3 743 575 A1

(12)

(43) Date of publication: 02.12.2020 Bulletin 2020/49 (21) Application number: 18807687.1 (22) Date of filing: 13.11.2018

(51) International Patent Classification (IPC):  E04H 1/12(2006.01) E05B 7/00(2006.01) E05C 19/00(2006.01) (86) International application number: PCT/GB2018/053288 (87) International publication number: WO 2019/145665 (01.08.2019 Gazette 2019/31)

(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 Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 26.01.2018 GB 201801351 (71) Applicant: RSBP Ltd Newstead Industrial Estate Trentham Stoke On Trent ST4 8HX (GB)	(72) Inventors: WATSON, Brian London EC1M 5NW (GB) WILLS, Anthony London EC1M 5NW (GB) HALL, Philip London EC1M 5NW (GB) (74) Representative: Scintilla Intellectual Property Ltd  The Centrum Building 38 Queen Street Glasgow G1 3DX Glasgow G1 3DX (GB)