Picnics have always had a touch of the genteel about them. Wicker cases full of artfully stored china and cutlery. A bright checkered tablecloth covering lush green grass, preferably under an ancient tree with long lateral branches. Champagne, or maybe all the makings of a delightfully refreshing Pimm's Cup. Just you, your beloved, and Radio Raheem. That's right. Raheem is back and he is crashing your picnic.