(19)

(11)

EP 1 315 955 A1

(12)

(43) Date of publication: 04.06.2003 Bulletin 2003/23 (21) Application number: 01963281.9 (22) Date of filing: 07.09.2001

(51) International Patent Classification (IPC)7: G01M 3/16, G01M 3/18 (86) International application number: PCT/GB0104/044 (87) International publication number: WO 0202/3150 (21.03.2002 Gazette 2002/12)

(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: 09.09.2000 GB 0022145 14.12.2000 GB 0030574 (71) Applicant: B W Technologies Limited Farnham,Surrey GU9 9HT (GB)	(72) Inventor: BROOKS, Adrian, Edward Newport NP19 OFU (GB) (74) Representative: Spittle, Mark Charles  Urquhart Dykes & Lord,Three Trinity Court,21-27 Newport Road Cardiff CF24 0AA Cardiff CF24 0AA (GB)