(19)

(11)

EP 2 655 159 A1

(12)

(43) Date of publication: 30.10.2013 Bulletin 2013/44 (21) Application number: 11813802.3 (22) Date of filing: 20.12.2011

(51) International Patent Classification (IPC):  B61L 1/18(2006.01) (86) International application number: PCT/GB2011/052531 (87) International publication number: WO 2012/085560 (28.06.2012 Gazette 2012/26)

(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: 23.12.2010 GB 201021922 (71) Applicant: Control and Display Systems Limited Fareham, Hampshire PO15 7FT (GB)	(72) Inventor: FOX, Simon William Hampshire GU11 3EL (GB) (74) Representative: Robinson, Simon John  Barker Brettell LLP Medina Chambers Town Quay Southampton SO14 2AQ Southampton SO14 2AQ (GB)