I'm not entirely sure that the BBC's World Affairs Editor John Simpson always realises quite how unhelpful he's being to the BBC as far as its 'reputation for impartiality' goes.
I think that's because he lives in bubbles, and his bubbles - the BBC, Twitter and his social circle - overlap far too much, like overly intimate Venn diagrams.
Here he is today dropping a BBC Two documentary in it:
I’ve just finished watching the BBC’s excellent series ‘Trump Takes On The World‘, and am reminded of what a very senior British diplomat said to me in 2016: ‘This man is a total buffoon. If he gets elected, we’re all going to regret it.’