(19)

(11)

EP 4 771 333 A1

(12)

(43) Date of publication: 08.07.2026 Bulletin 2026/28 (21) Application number: 24768368.3 (22) Date of filing: 27.08.2024

(51) International Patent Classification (IPC):  F42B 12/20(2006.01) F42B 12/62(2006.01) F42B 12/22(2006.01) (52) Cooperative Patent Classification (CPC): F42B 12/20; F42B 12/202; F42B 12/22; F42B 12/625 (86) International application number: PCT/GB2024/052221 (87) International publication number: WO 2025/046224 (06.03.2025 Gazette 2025/10)

(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 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: 01.09.2023 GB 202313361 (71) Applicant: BAE SYSTEMS plc London SW1Y 5AD (GB)	(72) Inventors: BEETHAM, David,Lee Monmouthshire NP15 1XL (GB) TYRELL, Thomas, William Monmouthshire NP15 1XL (GB) (74) Representative: BAE SYSTEMS plc Group IP Department  Victory Point Frimley Camberley, Surrey GU16 7EX Camberley, Surrey GU16 7EX (GB)