Graham Bosher, 27
Graham Bosher, one of the founders of successful movie rental business Lovefilm, is living proof that adapting an existing business model can prove to be as good as inventing a new one. Rather than sending out movies by post, Graze, which was established by Bosher in 2007, offers a service that delivers healthy snacks. It now sends out 80,000 letterbox-sized boxes of fruits, nuts and dried berries a month, charging £2.99 a go – less than the delivery charge of most online supermarkets. Turnover this year is an impressive £2.5m, while a recent £2m investment from Octopus Ventures and DFJ Esprit suggests that the company could scale just as well as its older sibling.