Dr Simon Russell is a Senior Research Fellow and Unit Manager of the NIHR Policy Research Unit in Obesity at the UCL Great Ormond Street Institute of Child Health. Simon's role within the unit is to coordinate the activities of the research programme and develop, implement and monitor systems for the operational management of the programme. Simon also manages and conducts research that meets the programmes aims and objectives, contributes to the national health research strategy, and provides evidence to inform the thinking of policy makers. A key focus of Simon's research is applying emerging methodologies, particularly when conducting systematic reviews and when using epidemiological techniques with large data sets to explore the causes, consequences and treatments of obesity. Simon has a particular knowledge of child and adolescent health, obesity across the life course, inequalities in health, and policy research.