(19)

(11)

EP 1 159 604 A1

(12)

(43) Date of publication: 05.12.2001 Bulletin 2001/49 (21) Application number: 00909529.0 (22) Date of filing: 15.03.2000

(51) International Patent Classification (IPC)7: G01N 27/06, G01N 33/28, C10L 1/02, C10L 1/22 (86) International application number: PCT/GB0000/957 (87) International publication number: WO 0055/610 (21.09.2000 Gazette 2000/38)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 18.03.1999 GB 9906214 (71) Applicant: AAE Holdings Plc Haywards Heath,West Sussex RH16 1TX (GB)	(72) Inventors: HAZEL, Clifford James Hessenford,Cornwall PL11 3HW (GB) WILLIAMSON, Ian Vernon Stockport,Cheshire SK7 2HE (GB) (74) Representative: Harrison Goddard Foote  31 St Saviourgate York Y01 8NQ York Y01 8NQ (GB)