So I said,

"And round we go again. The vast majority of Labour members, supporters and voters want Remain. Especially the new and young ones. So how bad does Brexit have to get and how bad does the Tory chaos have to get before Labour's stance and policies reflect that?"

So they said,

"If this is true, why did pretty much every Labour constituency outside London vote Leave?"

So compare the maps. Election vs Referendum
https://www.theguardian.com/politics/ng-interactive/2017/jun/08/live-uk-election-results-in-full-2017

https://www.theguardian.com/politics/ng-interactive/2016/jun/23/eu-referendum-live-results-and-analysis

There's a kind of truth there, particularly in the North. But there's also clearly a lot of nuance. There's quite a number of constituencies outside London that were Labour-Remain. And that's true even in areas that might be thought of as "Traditional Labour Heartland".

The Labour problem that 60% (or whatever) voters want remain, but 60% of Labour seats wanted Leave is still around. But that was then. What's important now is whether that dynamic is changing. The perception is that the proportion wanting Remain is rising. And the proportion in the marginal and balanced seats is also rising. So even though there are seats that were Labour-Leave then, on balance now they're Labour-Remain. But that's a guess. What is there to back it up?