Professor Alessandra Lemma is Director of the Psychological Therapies Development Unit at the Tavistock and Portman NHS Foundation Trust. She is a clinical psychologist and a psychoanalyst. She is Visiting Professor, Research Dept of Clinical, Educational and Health Psychology, University College, and Visiting Professor of Psychological Therapies, School of Health and Human Sciences at Essex University. She is a Fellow of the British Psychoanalytic Society. She has published several books and papers on psychotherapy and psychoanalysis. Professor Mary Target is a clinical psychologist and a psychoanalyst. She is Professor of Psychoanalysis, Research Dept of Clinical, Educational and Health Psychology, University College London; she is also Professional Director of the Anna Freud Centre. She is a Fellow of the British Psycho-Analytical Society, and Course Organiser of UCL's Masters in Theoretical Psychoanalytic Studies and Doctorate in Child and Adolescent Psychoanalytic Psychotherapy. She carries out research on child and adult attachment, personality functioning and mentalization, and has a part-time psychoanalytic practice. Peter Fonagy, PhD, FBA is Freud Memorial Professor of Psychoanalysis and Head of the Research Department of Clinical, Educational and Health Psychology at University College London; Chief Executive of the Anna Freud Centre, London; and Consultant to the Child and Family Program at the Menninger Department of Psychiatry and Behavioural Sciences at the Baylor College of Medicine. He is also a fellow of the British Academy.