Here's a little more Twitter action concerning the BBC's World Affairs Editor and leading Brexit opponent Lord Adonis:
John Simpson: Russian defectors no longer seem safe in UK. Nor is anyone who happens to be around when they are attacked. British reaction to the Litvinenko murder was pathetic. Given it's the basic duty of any government to protect its people, how will Theresa May respond now?
Lord Adonis: So John, what do you suggest? Expel the Russian Ambassador and half of Russian diplomats in London (similar to Alec D-Home’s action in 1971)?
John Simpson: Not my job to tell the govt what to do. But experience shows that if you respond feebly to a brazen assault it's an open invitation for the same thing to happen again.
From every such exchange that I've ever read, I think it's pretty clear that John Simpson really does never think, even for one second, that he's ever expressed a non-impartial opinion on anything.