Cassie Hazell is a Research Fellow at the University of Sussex, and Brighton and Sussex Medical School. Mark Hayward is the Director of Research at Sussex Partnership NHS Foundation Trust, and an Honorary Senior Lecturer at the University of Sussex. Mark has been working with and learning from people who hear distressing voices for the past twenty years. Clara Strauss is a Consultant Clinical Psychologist and Clinical Research Fellow at Sussex Partnership NHS Foundation Trust, and an Honorary Senior Lecturer at the University of Sussex. Clara has worked for many years with people distressed by hearing voices. She is particularly interested in finding out more about the experience of hearing voices and in finding ways to reduce the distress that voices can cause. Clara is part of a research team, along with Mark, David and others, who have been evaluating a range of therapies for people distressed by hearing voices. David Kingdon is a Community Psychiatrist and Clinical Director working in Southampton. He is Professor of Mental Health Care Delivery at the University of Southampton. David has published many papers, book chapters and books about cognitive therapy of severe mental illness and mental health service development over the past several decades.