Oh, what fun Boris Johnson could have as soon as Keir Starmer became Labour Leader. As the Prime Minister most independent of the United States in living memory, he could release Julian Assange. He could find ways to reopen the cases of Ian Tomlinson and Jean Charles de Menezes. He could do the same in relation to torture and extraordinary rendition, and in relation to the effectiveness or otherwise of 10-year sentences for "benefit cheats". And so on.
Then he could put down a Commons motion approving of his having done each and all of those things, and he could force a Division of the House. Labour MPs would then be able to vote for Assange, for Tomlinson, for de Menezes, against torture and extraordinary rendition, and against 10-year sentences for "benefit cheats". Or they would be able to vote for Starmer. But they would not be able to do both. Their Constituency Labour Parties would be watching.