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(11)

EP 4 208 686 A1

(12)

(43) Date of publication: 12.07.2023 Bulletin 2023/28 (21) Application number: 21790512.4 (22) Date of filing: 31.08.2021

(51) International Patent Classification (IPC):  F41A 31/00(2006.01) F42B 5/02(2006.01) F41F 7/00(2006.01) (52) Cooperative Patent Classification (CPC): F41A 31/00; F41F 7/00; F42B 5/025 (86) International application number: PCT/GB2021/000096 (87) International publication number: WO 2022/049361 (10.03.2022 Gazette 2022/10)

(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: 04.09.2020 GB 202013913 (71) Applicant: The Secretary of State for Defence Salisbury, Wiltshire SP4 0JQ (GB)

(72) Inventors: PODGER, Benjamin Peter Edward Salisbury, Wiltshire SP4 0JQ (GB) ASMAN, Poppy Clare Salisbury, Wiltshire SP4 0JQ (GB) STOCKFORD, Luke Thomas Salisbury, Wiltshire SP4 0JQ (GB) HALL, Zachary Thomas Salisbury, Wiltshire SP4 0JQ (GB) (74) Representative: Phillips, Thomas Edward  Ministry of Defence Defence Intellectual Property Rights Poplar 2 No. 2214 MoD Abbey Wood (South) Bristol BS34 8JH Bristol BS34 8JH (GB)