A bulky parcel arrives at the door of my house in south London, and as I tear open the wrapping – first thick transparent plastic, then a padded envelope, then bubble wrap – the courier looks on uneasily: What is this, his expression says, some as yet respectable-looking crackhead who’s heading way on down – and fast? Sensing his mounting opprobrium, I scribble with the stylus on the hideous little grey screen of his hideous little handheld computer and gesture him away. Alone, I head for the kitchen … and the knives. More...