(19)

(11)

EP 3 234 231 A1

(12)

(43) Date of publication: 25.10.2017 Bulletin 2017/43 (21) Application number: 15813487.4 (22) Date of filing: 09.12.2015

(51) International Patent Classification (IPC):  C25D 11/02(2006.01) C23C 22/83(2006.01) C25D 11/10(2006.01) C23C 22/05(2006.01) C23C 22/24(2006.01) C25D 11/08(2006.01) C25D 11/24(2006.01) (86) International application number: PCT/GB2015/053764 (87) International publication number: WO 2016/097695 (23.06.2016 Gazette 2016/25)

(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 Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 17.12.2014 GB 201422471 (71) Applicant: BAE Systems PLC London SW1Y 5AD (GB)	(72) Inventors: ASHWORTH, Sam, Oliver Blackburn Lancashire BB2 7LF (GB) BOWDEN, Craig Blackburn Lancashire BB2 7LF (GB) (74) Representative: BAE SYSTEMS plc Group IP Department  Farnborough Aerospace Centre Farnborough Hampshire GU14 6YU Farnborough Aerospace Centre Farnborough Hampshire GU14 6YU (GB)