I was diagnosed with sleep apnoea several years ago. In the simplest terms, sleep apnoea is when you stop breathing, so your brain panics and startles you awake just enough to get everything going again. Because this is happening, you never settle into a deep, restorative sleep, so when you awake you feel tired, even if you’ve slept eight hours. To give you an overview of its seriousness, when I was in hospital with a broken leg, a nurse woke me around 3.00am because she said I didn’t appear to be breathing. On another occasion, after I was wheeled back to my bed following surgery, a nurse said she was…