It's the moment of the enraged centre, still furious with that tens of thousands of Labour Party members who elected Corbyn (twice), still furious that a Corbyn-led Labour Party increased the Labour vote to 12 million in 2017 and now in full throat certainty that they know why Corbyn 'lost the election'.
He 'lost the north', he 'lost the working class', they say, which presumably, the assured centre would have won. Would it have, though? The assured centre was much more Remain than Corbyn - or so they kept saying - so presumably they would have alienated even more of the working class north, wouldn't they?
Then again, the enraged centre keep pointing out that Corbyn is too 'north London', without noticing that more often than not, they are too. And after all, Tony Blair, won elections (apparently) because he was very smart, modern, and...er...north London. (Yes, I know he came originally from 'the North' but his pitch as an adult, was in part that he was Oxford educated and was in the smart north London set who had planned the whole New Labour project from a north London cafe. (I exaggerate, but you know what I mean.)
The 'lost the working class' line of argument has to pretend that the 10 million who voted Labour this time either doesn't exist (as in 'don't mention the 10 million'), or that the whole 10 million came from Islington. As far as I know there aren't 10 million people living in Islington. And it's also necessary to pretend that no one living in north London is a worker, that none of the people living in north London works in offices, factories (they still exist), as shop-workers, in fleets of vans, trucks, there are no transport workers, no health service workers...you get the drift. Just keep up the pretence that a Corbyn-led Labour Party got all 10 million votes from 'students' and 'Trots'.
So the enraged centre have a problem. They've got to find someone 'from the North' who is sufficiently centrist but presumably not over-infected by Remainer-ism and yet sufficiently popular with all those members of the Party who thought that a programme of supporting public services, better wages and a foreign policy that would avoid war was worth backing, but have now stopped thinking those things.