(19)

(11)

EP 4 466 430 A1

(12)

(43) Date of publication: 27.11.2024 Bulletin 2024/48 (21) Application number: 23702198.5 (22) Date of filing: 19.01.2023

(51) International Patent Classification (IPC):  E04H 15/18(2006.01) E04H 15/58(2006.01) E04H 15/20(2006.01) (52) Cooperative Patent Classification (CPC): E04H 15/20; E04H 15/18; E04H 15/58; E04H 2015/208; E04H 2015/206 (86) International application number: PCT/GB2023/050107 (87) International publication number: WO 2023/139377 (27.07.2023 Gazette 2023/30)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 19.01.2022 GB 202200672 (71) Applicant: Purple Line Limited Ipswich, Suffolk IP9 2BB (GB)	(72) Inventors: HARRISON, Jonathan Ipswich, Suffolk IP9 2BB (GB) WHITMORE, Toby Ipswich, Suffolk IP9 2BB (GB) PAYNE, James Ipswich, Suffolk IP9 2BB (GB) (74) Representative: Dummett Copp LLP  25 The Square Martlesham Heath Ipswich IP5 3SL Ipswich IP5 3SL (GB)