(19)

(11)

EP 3 829 731 A1

(12)

(43) Date of publication: 09.06.2021 Bulletin 2021/23 (21) Application number: 19745253.5 (22) Date of filing: 22.07.2019

(51) International Patent Classification (IPC):  A63G 21/22(2006.01) B61B 3/00(2006.01) E01B 25/24(2006.01) (86) International application number: PCT/GB2019/052049 (87) International publication number: WO 2020/025930 (06.02.2020 Gazette 2020/06)

(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: 31.07.2018 GB 201812514 (71) Applicant: Castree Projects Limited Chester, Cheshire CH2 4BT (GB)	(72) Inventor: EVANS, David Nicholas Chester Cheshire CH2 4BT (GB) (74) Representative: Appleyard Lees IP LLP  15 Clare Road Halifax HX1 2HY Halifax HX1 2HY (GB)