Dr Frank de Vocht is a Professor in Epidemiology and Public Health at the University of Bristol. He leads the NIHR School for Public Health Research methodological work on natural experiments for public health and brings expertise on the evaluation of natural experiments and analysis of observational and routine data included local authority data and co-leads the applied data science team at the NIHR Applied Research Collaboration West (ARC West). He has a background in occupational and environmental public health and radiation and is a member of COMARE and the Health Council of the Netherlands.