Hi Andyb73,
Thanks for taking the time to contact us via the Community. It's lovely having you on board with us in the Forums. ⭐
We're sorry to hear that TNT Sports is only showing on one of your boxes. This is something we can certainly check for you but in order to do that I'll need to confirm some information with you to pass security.
I've sent you a direct message to allow us to do this with you in a private space. Just click on the little ✉ at the top right-hand side of the page to access your inbox. :)
Many thanks,