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(11)

EP 2 300 848 A1

(12)

(43) Date of publication: 30.03.2011 Bulletin 2011/13 (21) Application number: 08874466.9 (22) Date of filing: 03.12.2008

(51) International Patent Classification (IPC):  G01S 13/524(2006.01) G01S 13/42(2006.01) (86) International application number: PCT/GB2008/003997 (87) International publication number: WO 2009/144435 (03.12.2009 Gazette 2009/49)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 29.05.2008 WO PCT/GB2008/001816 (71) Applicant: CAMBRIDGE CONSULTANTS LIMITED Cambridge CB4 0DW (GB)	(72) Inventors: OSWALD, Gordon, Kenneth, Andrew Cambridgeshire PE28 3LY (GB) WEBSTER, Craig, Duncan Cambridge CB4 9XL (GB) SMITHSON, Allan, Geoffrey Cambridgeshire CB21 4JT (GB) (74) Representative: Cozens, Paul Dennis et al Mathys & Squire LLP 120 Holborn London EC1N 2SQ 120 Holborn London EC1N 2SQ (GB)