If I already have discovery plus on my sky q, activated by sky, do I have to activate d discovery plus on my bt broadband . so I can watch TNT sports on discovery plus, on discovery plus app on sky q yes or no

If you already have Discovery+ activated through Sky Q, you do not need to activate it again on your BT broadband to access TNT Sports on the Discovery+ app on Sky Q. Your subscription through Sky Q is sufficient for accessing Discovery+ content, including TNT Sports. Just make sure that you are logged into the Discovery+ app on your Sky Q with the same account you used for activation.