(19)

(11)

EP 2 326 902 A2

(12)

(88) Date of publication A3: 15.04.2010 (43) Date of publication: 01.06.2011 Bulletin 2011/22 (21) Application number: 09785464.0 (22) Date of filing: 10.08.2009

(51) International Patent Classification (IPC):  F28F 13/00(2006.01) F28F 3/12(2006.01) F28D 20/02(2006.01) (86) International application number: PCT/GB2009/050996 (87) International publication number: WO 2010/018398 (18.02.2010 Gazette 2010/07)

(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 MK MT NL NO PL PT RO SE SI SK SM TR Designated Extension States: AL BA RS (30) Priority: 13.08.2008 GB 0814776 13.08.2008 EP 08275044 (71) Applicant: BAE Systems PLC London SW1Y 5AD (GB)	(72) Inventors: CHANDLER, Nicholas Chelmsford Essex CM2 8HN (GB) TODD, Murray,James Chelmsford Essex CM2 8HN (GB) EATLY, David Eccles Greater Manchester M30 8AP (GB)