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(11)

EP 3 449 545 A1

(12)

(43) Date of publication: 06.03.2019 Bulletin 2019/10 (21) Application number: 17721438.4 (22) Date of filing: 27.04.2017

(51) International Patent Classification (IPC):  H02J 7/00(2006.01) G01R 31/36(2019.01) H04W 52/02(2009.01) G06F 1/32(2019.01) (86) International application number: PCT/GB2017/051171 (87) International publication number: WO 2017/187175 (02.11.2017 Gazette 2017/44)

(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: 29.04.2016 GB 201607570 (71) Applicant: Vodafone IP Licensing Limited Newbury, Berkshire RG14 2FN (GB)	(72) Inventors: BAILEY, Richard London Greater London W2 6BY (GB) PAMLER, Martin London Greater London W2 6BY (GB) (74) Representative: Boult Wade Tennant LLP  Verulam Gardens 70 Gray's Inn Road London WC1X 8BT London WC1X 8BT (GB)