The national populism of the Brexit movement builds up its political worldview on the basis of an ethnocentric myth of continuous homogeneous British nationhood. This was a construct of the imagination that included nostalgia for lost British empire. It was tightly bound up with the Brexiters’ concept of ‘the people’, which brought into their campaign rhetoric the idea of ‘the will of the people’ and ‘the mandate of the people’, as well as ideas from social contract theory. ‘The will of the people’ was a phrase that ran throughout Brexitspeak, deployed by the ex-Remainer Theresa May and ardent Leavers alike, and backed up by the populist press. Brexitspeakers knew what the people’s will was, by implication at least. And the claim that this ‘will’ gave the government an unquestionable mandate followed automatically, despite the narrow margin by which the Leavers had won, and despite the fact that before it the result had been defined as ‘advisory’ only. There was also the question of who precisely constituted ‘the people’ at the referendum, for there were important groups of potential voters who were excluded by the Brexiter-influenced Referendum Act.