I can't watch BBC 1 at moment as there is a loud knocking noise on that channel, other channels are fine?
Welcome to the Community, I'm very sorry to learn about the problems you're experiencing with your TV service recently.
We're not aware of any national issues with BBC 1, I've also located your account to run some tests and we're not detecting any errors from our end.
I hope this means that things are working as they should at the moment?
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