(19)

(11)

EP 2 986 768 A1

(12)

(43) Date of publication: 24.02.2016 Bulletin 2016/08 (21) Application number: 14716388.5 (22) Date of filing: 04.04.2014

(51) International Patent Classification (IPC):  D04H 1/74(2006.01) (86) International application number: PCT/GB2014/051053 (87) International publication number: WO 2014/170637 (23.10.2014 Gazette 2014/43)

(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 (30) Priority: 15.04.2013 GB 201306762 (71) Applicant: The University of Bristol Bristol BS8 1TH (GB)	(72) Inventors: YU, HaNa Bristol BS8 1TR (GB) POTTER, Kevin Bristol BS1 1TR (GB) (74) Representative: Ribeiro, James Michael  Withers & Rogers LLP 4 More London Riverside London SE1 2AU London SE1 2AU (GB)