(19)

(11)

EP 1 249 012 A1

(12)

(43) Date of publication: 16.10.2002 Bulletin 2002/42 (21) Application number: 01900483.7 (22) Date of filing: 08.01.2001

(51) International Patent Classification (IPC)7: G09F 19/22, F21K 2/00 (86) International application number: PCT/GB0100/047 (87) International publication number: WO 0105/2224 (19.07.2001 Gazette 2001/29)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 08.01.2000 GB 0000283 25.07.2000 GB 0018063 25.08.2000 GB 0020956 (71) Applicant: STG Aerospace Limited Swaffham,Norfolk PE37 7XD (GB)	(72) Inventors: STOKES, Peter David DerehamNorfolk NR20 5LE (GB) BODLE, Peter Winstanley Stoke FerryNorfolk PE33 9UE (GB) (74) Representative: Lawrence, John  Barker Brettell 138 Hagley RoadEdgbaston Birmingham B16 9PW Birmingham B16 9PW (GB)