(19)

(11)

EP 4 824 501 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 24812208.7 (22) Date of filing: 15.11.2024

(51) International Patent Classification (IPC):  F41H 13/00(2006.01) F42B 27/00(2006.01) F42B 12/42(2006.01) (52) Cooperative Patent Classification (CPC): F41H 13/0056; F41H 13/0087; F42B 12/42; F42B 27/00 (86) International application number: PCT/GB2024/052911 (87) International publication number: WO 2025/125773 (19.06.2025 Gazette 2025/25)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 13.12.2023 GB 202318992 13.12.2023 EP 23275173 (71) Applicant: BAE SYSTEMS plc London SW1Y 5AD (GB)	(72) Inventors: GRIFFITH, Michael Stewart Chelmsford Essex CM2 8HN (GB) WILLIAMS, Andrew James Chelmsford Essex CM2 8HN (GB) (74) Representative: BAE SYSTEMS plc Group IP Department  Victory Point Frimley Camberley, Surrey GU16 7EX Camberley, Surrey GU16 7EX (GB)