In conversation, Purdham veers from the pragmatic to the preposterous. He concedes that making money from digital music is "like climbing Everest", before proposing that a whole new industry will soon be built around 3D printing. "People talk about piracy – they haven't even begun to scratch what piracy is going to be like in the future," he says, perched on the rust-coloured sofa in his north London office. "You design a glass jar or a sculpture, and anybody will be able to print that in their own home. You will be able to print guns. You can already print body parts on a 3D printer. All of these things that Star Trek had are starting to come true."I think he is right. Future will be interesting.