Jay Rayner is a journalist, food critic and author, best known for his entertaining food and drink criticism and gastronomic publications. His latest book, Chewing the Fat, is a collection of some of his columns, digging deep into the world of food. In this Ways to Change the World he talks to Krishnan about how politics and culture reflect and influence our eating habits - and reveals his lesser-known love and talent for jazz music. Producer: Rachel Evans