For some reason this channel seems to be blank. Went off earlier today and hasn't came back. If you rewind you can pick the channel up again, but once it catches up the audio goes off again. If i turn the box on and off a few times i can sometimes get the channel working, but if i change channels it's gone again. I have reset my current box and that hasn't fixed the issue. I have also tried a second BT 4k UHD box and that also has the same problem.
If you get the problem again see what happens if you press pause and then play button on the remote.
If you pause and press play, then the audio comes back like normal. The splash logo is still missing though. If you press stop to go back to live or move channel the audio is gone again.