Does that not assume that Corbyn and the left will definitely step aside? Could you not end up with them dog-in-the-mangering? They know they'll never get another chance to control the Labour Party (and that, it would appear, is what matters most to them) - I wonder if they'll let it go that easily?
But Corbyn's position has been pretty much untenable for over a year now. And he's still leader because there are enough lunatics out there who are Labour members who'll keep him in place. I have a distinct feeling that merely leading Labour into its most catastrophic election defeat since 1935 won't be enough to stop them voting for him. They'll believe that this sort of 'purge' will be a good thing.
Never underestimate just what raving fûcking madmen these people are, p.
They also get bored very easily and very quickly. I am not saying it will happen overnight but an early election will hasten the process. There is pretty much no party organisation on the ground in around 50% of the country and none of those people are coming back until that tosser is gone. This will be the first election in 40 years that my mum hasn't been part of.