(19)

(11)

EP 3 752 691 A1

(12)

(43) Date of publication: 23.12.2020 Bulletin 2020/52 (21) Application number: 19708600.2 (22) Date of filing: 14.02.2019

(51) International Patent Classification (IPC):  E04G 11/22(2006.01) E04G 3/30(2006.01) E21D 13/00(2006.01) E04G 3/24(2006.01) E21D 5/12(2006.01) E21D 11/10(2006.01) (86) International application number: PCT/GB2019/050398 (87) International publication number: WO 2019/158928 (22.08.2019 Gazette 2019/34)

(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: 14.02.2018 GB 201802385 15.10.2018 GB 201816729 (71) Applicant: SLIPFORM ENGINEERING LTD Hull HU1 2BN (GB)	(72) Inventor: HANLEY, Eamon West Hull, Yorkshire HU1 2BN (GB) (74) Representative: Murgitroyd & Company  Murgitroyd House 165-169 Scotland Street Glasgow G5 8PL Glasgow G5 8PL (GB)