Planning for the worse case scenario, however unlikely, is no bad thing. It's a shame that May and her merry band of Brexiteers aren't doing likewise.
Paul Mason gets more unpalatable with each passing day. Last week he was celebrating the Russian Revolution (a revolution which, let us remember, directly resulted in millions of deaths and gave rise to the most murderous and oppressive regime on Earth). I despair that people like him are running the Labour Party.
I expect there are scenarios of the world destroyed by nuclear war and aliens starting a chain of restaurants.