Many of us fall into bed exhausted after a long day expecting to have a good night's rest, only find ourselves awake in the middle of the night unable to sleep.
For those who suffer with insomnia, trying to overcome it by scrolling through your phone or simply tossing and turning in hopes of falling asleep only results in remaining awake for hours.
Dr Michael Mosley, who is best known for his dieting tips - and is now exploring the science of sleep - has a top tip for what to do when you wake up in the middle of the night.
