(19)

(11)

EP 3 631 078 A1

(12)

(43) Date of publication: 08.04.2020 Bulletin 2020/15 (21) Application number: 18730061.1 (22) Date of filing: 31.05.2018

(51) International Patent Classification (IPC):  D06P 1/00(2006.01) D06P 1/92(2006.01) (86) International application number: PCT/GB2018/051480 (87) International publication number: WO 2018/220375 (06.12.2018 Gazette 2018/49)

(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: KH MA MD TN (30) Priority: 02.06.2017 GB 201708816 26.04.2018 GB 201806803 (71) Applicant: University of Leeds Leeds LS2 9JT (GB)	(72) Inventor: BURKINSHAW, Stephen, Martin Leeds West Yorkshire LS2 9JT (GB) (74) Representative: HGF Limited  1 City Walk Leeds LS11 9DX Leeds LS11 9DX (GB)