The left must stop mourning Brexit – and start seeing its huge potential | Larry Elliott

Those who predict economic Armageddon ignore the reality. The status quo wasn't working - now there's an opportunity for change

So this is it. Forty-eight years after Britain joined what was then the European Economic Community, the fasten seatbelt signs are switched on and the cabin lights have been dimmed. It is time for departure.

Many in the UK, especially on the left, are in despair that this moment has arrived. For them, this can never be the journey to somewhere better: instead it is the equivalent of the last helicopter leaving the roof of the US embassy in Saigon in 1975.