Thanks Red (your posts are always informative!). Broadly, leaving the EU is a right wing thing (only Con and Ukip have a majority in favour: although 4% of Ukip wanting to stay is a bit whacko). As a fan of liberal muddle, and restraining any party from full blooded whatever through fragile majorities, the electoral cycle and all the brakes which our system applies (not always I accept) it looks like Lab or SNP are the best ...
On JC: I haven't followed him closely, but what I have seen of his utterances he seems sensible and consistent. BUT, and it is a big but, he has no charisma, and some of his apparent beliefs are difficult to understand in the context of running a government in a messy world. I cannot imagine him as holding any ministerial post whatsoever. He simply hasn't got the flexibility and pragmatism to run a department, let alone the country. (IMO you can only do this if you have both, accepting that sometimes principles must end: you can go too far and have no principles, a la Boris, but that doesn't attract me although it works for many others.)
So he should go. Labour will never win power with him in charge, nor (from his performance thus far) be an effective opposition, holding the government to account. Cameron's extraordinary call for JC to 'go' seems to recognise that government works best if probed and tested, and JC simply doesn't do this effectively.
However, his refusal to resign is in accordance with his principles and the Labour constitution, as I understand both. The party as a whole elected him, and only the party as a whole can remove him. (I might add that his inability or refusal to recognise that he should go is another illustration of the lack of pragmatic flexibility essential for good governance.)
Gove/Vine: the Sky disclosed email reveals that they have Boris's number: if it isn't crystal clear and written in blood, Boris will wriggle out of it - he is totally untrustworthy. I suspect that aspect of Boris is why Dacre/Murdoch mistrust Boris. He isn't reliable right wing, and will play left wing if he sees a personal advantage. It's all about Boris to Boris, and there are no other principles.