In the UK it is estimated that 25% of adults and 20% of children experience insufficient sleep. Insufficient and/or disrupted sleep has been linked to many aspects of human health and wellbeing. Much of the evidence about sleep and health comes from small scale studies, and little is understood about factors that influence sleep in the general population, and how such influences might vary across different stages of the lifecourse. The proposed work will look at the influences on, and consequences of sleep across the lifecourse, by exploiting rich contextual, health, education and biomarker data from the UK’s longitudinal studies.