As much as Labour tried to change the narrative to austerity, what motivated the British public to give Upper Class Twit of the Year Boris Johnson and his fox hunting buddies a five year license to trample all over the British commons was Boris' clear stand in favor of Brexit.

.
Open diamonds are flipped seats, which shows that nearly all of the flips from Labour to the Tories happened in majority Leave districts.

full chart here

and the analogies with Sanders and the US only go so far.

Politics in the US, Britain, and Europe in general are being upended, I'd caution against pigeon holing things into the old left/right, Dem/Repub, Tory/Labor, scenario.

A little over a year ago I wrote this.

U.K. PM Boris Johnson probably didn't expect it to be this hard.

On the same day that Britain's economy stalled, new PM Boris Johnson told the people working for him to make preparing for a no-deal Brexit their "absolute top priority".

The UK European elections are about to happen, and it couldn't be worse for the Tories.

I wrote the other day how Brexit was imploding the Tories. It turns out that the Tory collapse is picking up speed, all to the benefit of UK Labour.

A year ago I wrote "Politically the Tories have no plan at all, and when the clock stops on Brexit they will completely implode."
The clock is beginning to stop.