David Nutt FRCP, FRCPsych, FMedSci, is a psychiatrist at Imperial College London. He trained at Cambridge, Guys Hospital, Oxford University and NIH in the USA. His research focuses on the use of PET and fMRI imaging to understand how drugs work in the brain and the mechanisms underpinning psychiatric disorders particularly addiction and depression. He has published over a thousand research papers, 35 books and 8 government reports. He won the John Maddox prize for standing up for science in 2013