The Leave vote gave voice to those whose dissatisfaction had been muted by the rules of UK electoral politics. It represented, amongst other things, a howl of protest from people who had given up on the political process and who turned out to demand that they should no longer be overlooked. In so doing, they transformed our politics. The referendum catalysed a division in British politics which, while not new, had hitherto not structured party competition decisively. That role had been played by class. As Peter Pulzer famously put it, ‘class is the basis of British party politics; all else is embellishment and detail’. However, the 2016 vote saw similar proportions of left- and right-wing voters opt for Leave (52% and 48%, respectively). People were divided not by class but by social outlook, with 72% of social conservatives but only 21% of social liberals voting to leave.