Ariel Nathanson is a Consultant Child and Adolescent Psychotherapist. He is the clinical lead for the treatment of the under 21s at the Portman Clinic, where he has been working for many years, specialising in the assessment and treatment of children, adolescents and young adults who display perverse, delinquent and violent behaviours. Graham Music (PHD) is Consultant Child and Adolescent Psychotherapist at the Tavistock and Portman Clinics and an adult psychotherapist in private practice. Formerly Associate Clinical Director of the Tavistock’s child and family department, he has managed a range of services working with the aftermath of child maltreatment and neglect, and organised many community based psychotherapy services. Janine Sternberg is Clinical Course Director of the IPCAPA (Independent Psychoanalytic Child and Adolescent Psychotherapy Association) training at the bpf. Previously she worked as a Consultant Child Psychotherapist at the Portman Clinic, Tavistock and Portman NHS Trust, having worked for many years before that at the Tavistock Mulberry Bush Day Unit, a small unit for children with complex difficulties.