"I sit here with stage two diabetes because at one point in my life, between 25 and 40, all I did was work and eat fast-food," he says. "I grew up on a council estate, my mother sold soap at a market stall, and after leaving school at 17, I started from scratch working in a pub, then built my own chain - called Tom Cobleigh - which I grew to 78 pubs. I was working my nuts off and making my fortune [Mapp is worth well over £6 million], but my lifestyle was unhealthy and I became obese, weighing 17-and-a-half stone."