By Ariane Sohrabi-Shiraz With almost one in five people in the UK not getting enough sleep, it can sometimes help to know that some small changes to your diet can help. Dr Michael Mosley, who is known for creating the Fast 800 diet and his regular appearances on The One Show, knows all too well about sleeping difficulties, and the problems it can cause. “I used to be one of those people who could sleep deeply any time, any place,” he said. He continued: “I once slept the night in a telephone kiosk having missed the last train home. But in the past few years my sleep has become more erratic and…