I had a similar situation when turning right at a roundabout at Birmingham international station. The Bus came through the underpass from the airport and then did not give way. My right turn changed to left very quickly. I challenged him in a calm manner. From his body language he knew what he had done and you've guessed it said SMIDSY. I pointed out the bright orange bike and the even brighter yellow jacket that I was wearing. His response became less defensive and admitted he should have stopped. I left it at that.
