(19)

(11)

EP 4 189 166 A1

(12)

(43) Date of publication: 07.06.2023 Bulletin 2023/23 (21) Application number: 21745399.2 (22) Date of filing: 07.07.2021

(51) International Patent Classification (IPC):  E01F 15/04(2006.01) E01F 9/685(2016.01) (52) Cooperative Patent Classification (CPC): E01F 15/0476; E01F 9/685 (86) International application number: PCT/GB2021/051736 (87) International publication number: WO 2022/023702 (03.02.2022 Gazette 2022/05)

(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: 30.07.2020 GB 202011827 (71) Applicant: Petters, Karl Newmarket, Suffolk CB8 8FZ (GB)	(72) Inventor: Petters, Karl Newmarket, Suffolk CB8 8FZ (GB) (74) Representative: Lipscombe, Martin John  Nash Matthews LLP 24 Hills Road Cambridge CB2 1JP Cambridge CB2 1JP (GB)