(19)

(11)

EP 1 342 047 A1

(12)

(43) Date of publication: 10.09.2003 Bulletin 2003/37 (21) Application number: 00993925.7 (22) Date of filing: 13.12.2000

(51) International Patent Classification (IPC)7: F42B 4/26 (86) International application number: PCT/GB0004/762 (87) International publication number: WO 0204/8641 (20.06.2002 Gazette 2002/25)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR (71) Applicant: The Secretary of State for Defence SalisburyWiltshire SP4 0JQ (GB)	(72) Inventors: CALLAWAY, James Dominic,DERA Farnborough Farnborough,Hampshire GU14 0LX (GB) SUTLIEF, Timothy Douglas,DSTL Salisbury,Wiltshire SP4 0JQ (GB) (74) Representative: Beckham, Robert William  D/IPR Formalities Section,Poplar 2,Mod Abbey Wood Nr. 2218 Bristol BS34 8JH Bristol BS34 8JH (GB)