Hi Sky now use's IPv6 as well as IPv4 the D7000 does not automatically set this up.
As its up to ISP'S if they want to run this option.
Its very easy to set up follow this guide below-
Log on to your router setup go> ADVANCED > Advanced Setup > IPv6.
Set Internet connection select- DCHP
Next go to LAN Setup> Auto config should be ticked.
The modem router automatically detects the address information
Look under Router’s IPv6 Address On LAN, you should see the IPv6 address that is acquired for the modem router’s LAN interface.
Then select> Use this interface ID> enter the first 4 blocks of the address shown.
Then hit apply job done.
To test your IPv6 connection, open a new browser tab enter>
https://checkyoursix.computerlagoon.com/
It will tell you if your IPv6 is working and you'll see your current IPv4 Address and IPv6 address.
If all is well, go back to your IPv6 setup, select IP address assignment tick> Use DCHP server, hit apply done.