(19)

(11)

EP 2 694 954 A1

(12)

(43) Date of publication: 12.02.2014 Bulletin 2014/07 (21) Application number: 12717453.0 (22) Date of filing: 03.04.2012

(51) International Patent Classification (IPC):  G01N 23/203(2006.01) H01J 37/28(2006.01) H01J 37/244(2006.01) (86) International application number: PCT/GB2012/050752 (87) International publication number: WO 2012/136993 (11.10.2012 Gazette 2012/41)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 04.04.2011 GB 201105609 (71) Applicants: Blg Productions Ltd Bristol, Bristol BS6 5SH (GB) Dingley, David J. St. Mawgan, Cornwall TR8 4EU (GB)	(72) Inventors: MEADEN, Graham Mark Bristol Bristol BS6 5SH (GB) DINGLEY, David J St. Mawgan Cornwall TR8 4EU (GB) (74) Representative: Hall, Christopher David et al Withers & Rogers LLP 4 More London Riverside London SE1 2AU London SE1 2AU (GB)