VM and plusnet users running out of options.
Latest figures published at UK AS-numbers IPv6 usage, top 3 by number of users:
AS-Company Users IPv6-Users %-UK-IPv6
Sky UK Ltd 13,520,096 11,342,935 86.93
BT-UK-PLC 13,152,552 1,002,430 7.68
Virgin-Media 12,174,284 579 0