Richard Whittington is Professor of Mental Health in the School of Health Sciences at the University of Liverpool and an Honorary Research Fellow at Mersey Care NHS Trust. He has a PhD from the Institute of Psychiatry in London, and is a researcher and forensic psychologist with a particular research interest in the issues of violence, self-harm and mental health. Caroline Logan is a Consultant Forensic Clinical Psychologist in Greater Manchester West Mental Health NHS Foundation Trust and an Honorary Research Fellow at the University of Manchester. She has a DPhil from the University of Oxford and is both practitioner and researcher, focusing on violence and self-harm, personality disorder and risk.