Solved! Go to Solution.
As far as I'm aware, BT haven't even enabled the HH5 for IPv6 let alone HH4. Stick with the TP Link and forget IPv6
If it helps for comparison, I am using an HH4 and it is showing the version as:
|3. Firmware version:|
Software version 22.214.171.124.126.96.36.199.32 (Type A) Last updated 02/11/16
The whole BT network is now enabled for IPv6, it is just a question of whether your end device supports it or not.
The mods can mark it as solved. It answered the question in any case, HH4 doesn't have IPv6 capability and the network is fully enabled.
I have HH5 which tells me that IPv6 is disabled. I don't currently have a need for it and can happily wait for HH7.