I am Professor of Paediatric Surgery at the University of Oxford, and Director of the Oxford Islet Transplant Programme. I am a Fellow and Clinical Tutor at St Edmund Hall. I qualified in Medicine from the University of Leicester and trained in Paediatric Surgery in Oxford, Melbourne and Great Ormond Street. My particular clinical interests are paediatric and endocrine surgery, and cell transplantation. My research interests include optimising human islet isolation, and understanding normal pancreatic development and islet neogenesis. I was awarded a Hunterian Professorship from the Royal College of Surgeons of England for this research in 1998. I am currently Immediate Past President of the International Pancreas and Islet Association (IPITA) having served as President from 2011-2013. I was awarded an Honorary Fellowship of The American Academy of Paediatrics in February 2010. I currently sit on a number of Research Boards and Editorial Boards. I chair the Nuffield Department of Surgical Sciences Clinical Academic Sub Group.