As I just said to my dad, I think the thread I’ve read by Peston (and Matthew Parris is apparently saying similar), saying that he’s toast whatever the result and that he’ll be gone soon, like May and Thatcher were, is deluded as BJ has no sense of morality or responsibility (to anyone other than himself). He will continue to cling on beyond all sense of logic.
So, if he doesn’t lose the VONC tonight, even if he only “wins” by one vote, he’ll stay on and try to brazen it out.
I could even see him calling a snap election. He would need to move himself to a “safe” seat as he’d lose in his current constituency. But the prediction for Tiverton suggests there is no such thing as a safe seat 
He still thinks that sound bites like "Oven Ready Deal" even if they're lies will win round the public
The latest one is "The Public just wants us to move on".