(19)

(11)

EP 4 251 511 A1

(12)

(43) Date of publication: 04.10.2023 Bulletin 2023/40 (21) Application number: 21824515.7 (22) Date of filing: 30.11.2021

(51) International Patent Classification (IPC):  B63C 9/125(2006.01) B63C 9/18(2006.01) B63C 9/15(2006.01) B60C 29/00(2006.01) (52) Cooperative Patent Classification (CPC): B63C 9/18; B63C 9/1255; B63C 9/155; B63C 9/24; B63C 2009/007 (86) International application number: PCT/EP2021/083590 (87) International publication number: WO 2022/112601 (02.06.2022 Gazette 2022/22)

(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: 30.11.2020 GB 202018812 (71) Applicant: Survitec Group Limited London EC2A 1AS (GB)	(72) Inventors: PARKES, Nigel Salisbury, Wiltshire SP2 9NB (GB) WILLIAMS, Zachary James Romsey, Hampshire SO51 0DH (GB) (74) Representative: Foster, Mark Charles et al Mathisen & Macara LLP Charta House 30-38 Church Street Staines-upon-Thames, Middlesex TW18 4EP Staines-upon-Thames, Middlesex TW18 4EP (GB)