OPINION - Six years on, the greatest legacy of Brexit is the lies that will outlast Boris Johnson

We do not talk about Brexit any more. So it is easy to forget about the origins of a damaging trend of lying and denial in politics. They in fact go further back than Johnson’s premiership, to a vote in 2016, and to the cynical falsehoods told by the Leave campaign — the £350 million dividend for the NHS, the incendiary claim that Turkey was close to securing EU membership.