If you’ve ever been to a march attempting to legalise drugs you’ll have seen Howard Marx preaching in his funny stoned manner. If you haven’t ever been on a legalise cannabis march, you’ll have seen Mr Marx’s face in every bookshop, on the cover of Mr Nice, his autobiography. It’s the very same autobiography they’ve just made a film of staring Rhys Ifans out on 8th October, and you can watch some exclusive clips here.