Make no mistake, British politics is feeling the early tremors of an earthquake – one that could prove even more of a spectacular leveller than the crumbling of the Red Wall. The sentiment driving it is an enigma. It isn’t the “ick factor” – the visceral disgust that seeped into Westminster discourse in the 2010s. It isn’t populist “anger” – the rebellious mixture of ire and optimism that propelled boomer voters to vote for Brexit and crush Corbyn’s Labour. It is the white heat of moral rage: an