We're not in America. Stop comparing this to the democrats.
Sure. But places like Putney and Canterbury going to LAB while the North shifting to CON looks a awful like VA and CO going to Dems while WI PA and MI moving toward GOP.
But the Northwest and Northeast of England actually have had decades of socialist tradition...they didn't fail to vote for Corbyn's Labour Party purely out of ideology. A left-wing leader with a clear opinion on Brexit and with a clear agenda to combat and expel anti-semitic/hateful members of the party would have done well, I think. It's just that Corbyn came across as so weak on so many issues except fighting austerity, which is an issue that voters had already made their minds up on.
Are you suggesting that Wisconsin, Michigan, and Pennsylvania do not have strong socialist traditions?
Something they share with the north of England is that those socialist traditions were rooted in a strong labor movement, which has all but disappeared along with those jobs, leaving the people there susceptible to nationalist and racist sentiment.