Dr Tom Walker is senior lecturer in ethics at Queen’s University Belfast, and currently director of the University’s Centre for the Study of Risk and Inequality. His research focuses on questions in applied ethics, most notably connected to health. He is currently working on three broad and interrelated topics: ethical issues in the treatment and prevention of chronic illness, the challenges of an ageing population, and the nature of consent. All this work is highly interdisciplinary and has been supported by funding from the UK government and the Wellcome Trust. Before moving to Queen’s Dr Walker spent seven years as a lecturer at the Centre for Professional Ethics at Keele University. That, in turn, followed on from an earlier career as an engineer in the electricity supply industry.