Reply to post:

@ Lee D

BT don't on their network.

Virgin Media don't on their network.

Bye-bye 99% of users who would use those services, whether they know it or not.

BT & sky have 100 % ipv6 coverage for their non business customers. Virgin have not started ipv6 deployment yet, not sure on the others

http://www.ispreview.co.uk/index.php/2015/09/uk-isp-bt-to-deploy-ipv6-to-entire-network-by-december-2016.html