Professor Richard Lilford has pursued a successful career in medicine for over 40 years, specialising in obstetrics and gynaecology and more recently, health service research. He has research methodological expertise in the evaluation of complex interventions and prospective health economic evaluations of service delivery interventions. He has designed a framework for the evaluation of complex interventions that draws a crucial distinction between targeted and generic service interventions and is also interested in Bayesian statistics, medical ethics, clinical trials, step-wedge cluster trials, and multiple-indication reviews. He is also invested in global health research, including health and sanitation in low and middle-income countries, treatment and prevention of leprosy and Buruli ulcers, and improving health in slums.Richard is also Director of the NIHR Applied Research Collaboration West Midlands (ARC WM), and the NIHR Global Health Research Unit on Improving Health in Slums. He has published over 375 original research papers and is an investigator on over £35 million worth of government, industry and charity sponsored research grants. In 2018 he was awarded a CBE in recognition of his services to health research.Richard writes a monthly ARC WM News Blog, which you can subscribe to at: http://eepurl.com/drEb4v