European Patent. Patent number: EP3320357 B1; Application number: 16732715.4; Date of filing: 23.06.2016; Publication date and mention of the grant of the patent: 07.08.2019 Bulletin 2019/32; International application number: PCT/GB2016/051880; International publication number: WO 2017/006079 (12.01.2017 Gazette 2017/02)