(19)

(11)

EP 0 972 123 A1

(12)

(43) Date of publication: 19.01.2000 Bulletin 2000/03 (21) Application number: 98909588.0 (22) Date of filing: 09.03.1998

(51) International Patent Classification (IPC)7: E04H 15/32, E04B 1/58 (86) International application number: PCT/GB9800/703 (87) International publication number: WO 9845/557 (15.10.1998 Gazette 1998/41)

(84) Designated Contracting States: DE DK ES FR GB IT SE (30) Priority: 10.04.1997 GB 9707281 (71) Applicant: THE SECRETARY OF STATE FOR DEFENCE London SW1A 2HB (GB)	(72) Inventor: DAVIES, Gareth ColchesterEssex CO2 7SS (GB) (74) Representative: Skelton, Stephen Richard et al Ministry of DefenceDirectorate of Intellectual Property RightsFormalities SectionPoplar 2MOD Abbey Wood 19 Bristol BS34 8JH Bristol BS34 8JH (GB)