Consultant Forensic Psychiatrist and was formerly a Senior Lecturer in Forensic Psychiatry at University College London. He was co-founder of the Fixated Threat Assessment Centre (FTAC), a novel joint police/National Health Service unit for the assessment and management of concerning and threatening behaviour towards politicians and the Royal Family. He was co-founder of the UK’s National Stalking Clinic. He is author or co-author of sixty papers in the specialist literature and fifteen book chapters. He is a co-author of the Stalking Risk Profile and of the Communications Threat Assessment Protocol. He is currently a director of Theseus LLP, a company which provides an FTAC-style threat management service to private individuals and institutions.