(19)

(11)

EP 3 555 381 A1

(12)

(43) Date of publication: 23.10.2019 Bulletin 2019/43 (21) Application number: 17832316.8 (22) Date of filing: 14.12.2017

(51) International Patent Classification (IPC):  E03B 7/07(2006.01) E03C 1/10(2006.01) E03B 7/08(2006.01) E03C 1/122(2006.01) (86) International application number: PCT/GB2017/053741 (87) International publication number: WO 2018/109475 (21.06.2018 Gazette 2018/25)

(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: MA MD TN (30) Priority: 15.12.2016 GB 201621369 (71) Applicant: McAlpine & Co Limited Glasgow, Strathclyde G52 4LF (GB)	(72) Inventor: MCALPINE, James Edward Paisley Renfrewshire PA2 9LA (GB) (74) Representative: Creation IP Ltd  Hillington Park Innovation Centre 1 Ainslie Road Glasgow G52 4RU Glasgow G52 4RU (GB)