(19)

(11)

EP 3 123 329 A1

(12)

(43) Date of publication: 01.02.2017 Bulletin 2017/05 (21) Application number: 15714256.3 (22) Date of filing: 24.03.2015

(51) International Patent Classification (IPC):  G06F 9/50(2006.01) G06F 1/32(2006.01) G06F 21/62(2013.01) G06F 11/34(2006.01) (86) International application number: PCT/GB2015/050862 (87) International publication number: WO 2015/145126 (01.10.2015 Gazette 2015/39)

(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 (30) Priority: 28.03.2014 EP 14250055 (71) Applicant: British Telecommunications Public Limited Company London EC1A 7AJ (GB)	(72) Inventors: SHACKLETON, Mark London EC1A 7AJ (GB) SAFFRE, Fabrice London EC1A 7AJ (GB) (74) Representative: Williamson, Simeon Paul  BT Intellectual Property Department Ground Floor BT Faraday Building, 1 Knightrider Street London EC4V 5BT Ground Floor BT Faraday Building, 1 Knightrider Street London EC4V 5BT (GB)