I am Director of the London School of Hygiene and Tropical Medicine and a professor of clinical epidemiology. I am also a practicing doctor in NHS general practice. During my career I have been supported by fellowships from MRC, NIHR and Wellcome. I was previously a Trustee of the British Heart Foundation and a non-executive director of the Medicines and Healthcare products Regulatory Agency. I am a member of the strategic oversight committee for UK Biobank and an elected Fellow of the Academy of Medical Sciences. I co-chair the BMJ Commission on the Future of the NHS.