One of my golden rules of politics is to listen carefully to Alastair Campbell – and then do the opposite.
The Labour spin doctor, who's pumped out more dodgy dossiers than McDonald's has burgers, is reliably wrong about everything. And the issue on which he's been loudest for longest is the issue on which he's been mistaken the most – Brexit.
After the Brexit campaign, he tweeted with all the authority of someone who once said we were only 45 minutes from Armageddon: 'If we leave, Nissan leave.'
Well, not only did Nissan not leave, the car giant doubled down, last year announcing a £2 billion investment in its Sunderland car plant.