(19)

(11)

EP 3 682 060 A1

(12)

(43) Date of publication: 22.07.2020 Bulletin 2020/30 (21) Application number: 18804072.9 (22) Date of filing: 08.11.2018

(51) International Patent Classification (IPC):  E01C 11/22(2006.01) E03F 5/046(2006.01) E03F 3/04(2006.01) (86) International application number: PCT/GB2018/053237 (87) International publication number: WO 2019/092423 (16.05.2019 Gazette 2019/20)

(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: 08.11.2017 GB 201718436 (71) Applicant: Engmaster Limited London N1 7GU (GB)	(72) Inventor: KURIA, Martin Luton Bedfordshire LU4 0NL (GB) (74) Representative: Raynor, Simon Mark  Urquhart-Dykes & Lord LLP Altius House 1 North Fourth Street Milton Keynes MK9 1DG Milton Keynes MK9 1DG (GB)