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(11)

EP 3 365 495 A1

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(43) Date of publication: 29.08.2018 Bulletin 2018/35 (21) Application number: 16787541.8 (22) Date of filing: 21.10.2016

(51) International Patent Classification (IPC):  E01C 11/22(2006.01) (86) International application number: PCT/GB2016/053300 (87) International publication number: WO 2017/068367 (27.04.2017 Gazette 2017/17)

(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: MA MD (30) Priority: 23.10.2015 GB 201518838 (71) Applicant: Econpro Limited Deeside CH5 2LR (GB)	(72) Inventor: SUTTON, Philip Thornton Hough CH63 4JU (GB) (74) Representative: Murphy, David John  Forresters IP LLP Skygarden Erika-Mann-Strasse 11 80636 München 80636 München (DE)