Jamie Oliver is one of the UK’s best-known chefs and restaurant owners. He’s had world wide success with his books, TV series, and campaigns, but this week it was announced that his restaurant company had gone into administration with the loss of 1,000 jobs. Since he came onto our screens 20 years ago with the Naked Chef series he’s had a huge impact on British food culture. To find out how we speak to the presenter of BBC Radio 4’s the Food Programme Sheila Dillon and two men whose careers he helped launch: Tim Siadatan, who runs Trullo and Padella in London, and Martin Gott, an award-winning cheese maker from Cumbria.