If there's no appetite to try and open up the WA then what Boris can do is go to the EU with a long list of changes to the future relationship, not get them and then come back with all the blame being seemingly placed on the EU. That would be enough to justify the no-deal exit, and it seems that the EU is nervous about this approach, although they've had long enough to prepare. Boris also has a touch of the Farage about him, in that he's capable of creating some rhetoric that his core supporters can get behind and will come out and vote for, whether entirely truthful or not. Corbyn's appeal is more focussed and limited. I don't think it will take too much success on a number of small issues for him to be confident to call an election. Labour can't oppose an election being called now either, as it is their primary policy. If Boris gets a little momentum then it is curtains for the Brexit Party - he just needs to be hardline on a few key points and only the mental far right and racists will stay with the Brexit Party, just as happened with UKIP. If all the above sounds positive, I didn't intend it to be. Johnson is a dangerously intelligent fool. I think that the real concern is that the likes of Johnson, Farage and Corbyn to some extent thrive in the current instability and actually don't want it to end. The same with Sturgeon - without a cause to rail against, her actual record in government is poor. There's a vested interest in maintaining uncertainty and instability.