BT have at least partially rolled out support, as I have a v6 allocation on a BT broadband service.
"[IPv6 support] Home Hubs 4 and 5 support from early 2017"
http://www.ipv6.org.uk/wp-content/uploads/2016/11/UKIPv6Coun...
BT have at least partially rolled out support, as I have a v6 allocation on a BT broadband service.