(19)

(11)

EP 4 172 449 A1

(12)

(43) Date of publication: 03.05.2023 Bulletin 2023/18 (21) Application number: 20737379.6 (22) Date of filing: 29.06.2020

(51) International Patent Classification (IPC):  E06B 7/12(2006.01) E06B 1/70(2006.01) (52) Cooperative Patent Classification (CPC): E06B 7/12; E06B 1/702; E06B 2007/023 (86) International application number: PCT/EP2020/068295 (87) International publication number: WO 2022/002356 (06.01.2022 Gazette 2022/01)

(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 (71) Applicant: KSR Consultancy (NW) Limited Lowton Warrington Cheshire WA3 2RW (GB)	(72) Inventor: RIMMER, Keith Warrington Cheshire WA3 2RW (GB) (74) Representative: Mewburn Ellis LLP  Aurora Building Counterslip Bristol BS1 6BX Bristol BS1 6BX (GB)