The biology of sleep-why we need it, what happens when we don’t get enough and how to tackle sleep disorders

One in three people in the UK suffers from poor sleep. Many effects of poor sleep such as reduced mood and concentration are well known, but regular poor sleep can put people at risk of serious medical conditions such as obesity, heart disease and diabetes – and it even shortens life expectancy.

Two experts talk about their latest work on understanding why people need sleep and new ways of treating the common condition obstructive sleep apnoea.