Last June the British people reflected on their membership of the European Union, and on a turnout of 72 per cent decided by a clear majority to Leave. Just as there are regional variations in voting in general elections, so was it the case in the referendum. But the patterns did not fall along convenient party political lines. Indeed, all the major political parties campaigned for Remain.

The Government intends to trigger Article 50, the mechanism to implement Britain’s decision to leave the EU, in the same month as the EU will celebrate the 60th anniversary of the Treaty of Rome.