The Brexit vote is the huge spanner in this election. True, ake, the decision to leave has been made, but no party has sorted out even a vision of the relationship afterwards. So the leavers have every reason to vote in the way they think strengthens their view, even if they are traditionally aligned to another party. Equally, the remainers.

So I would not want to assume Mrs May will end up with an increased majority. She might, of course. But she might not.