We're a nation of bad sleepers: 15 million prescriptions are doled out for sleeping tablets every year, and the cost to the economy is £611 million, with one in five taking a day off work as a result of a bad night's kip.
In the first of our Sleep Week series, Dr Hilary Jones has tips for how to sleep well in the day for the thousands of people across the country who work night shifts.
With thanks to
Ian Finch from British Military Fitness
Chelsea and Westminster Children's Hospital nurses