[JOCK55]

I found that I had to have a TA channel selected as I noticed that i wasn't getting announcements whilst I was listening to music on my USB stick. It seems I needed to have Radio 4 or suchlike selected on the radio, as odd ones like Heart or Sixties Radio for example didn't interrupt my USB music.

Looking at the photo on the OP's original message, he was playing BBC Radio 2 (a TA channel)!