'It is hard to predict how full Brexit would play out, because this scale of multiple simultaneous renegotiations of global trade agreements is unprecedented – and no country has ever left the EU. It certainly can’t be assumed that Britain is bound to get quick and good deals because it is a large economy.'

If not, and the vote is to exit, it will be no good saying afterwards that “we didn’t understand what we were voting for” – the repeated complaint made by eurosceptics about the 1975 Referendum. By then it will be too late.

Since the Brexit vote in 2016, Ukip is no longer primarily concerned with attacking the EU. Now led by Gerard Batten, the party has started to normalise far-right ideas and has given roles to figures including Tommy Robinson.