Eddie Chaplin is a research and strategy lead for the Behavioural and Developmental Psychiatry department at the South London and Maudsley NHS Foundation Trust and visiting researcher at the Institute of Psychiatry, King's College London. As a nurse, he has managed a number of national services for people with neurodevelopmental disabilities. Recently, he has developed courses and modules at postgraduate level in mental health in intellectual disability and forensic intellectual disability. Steve Hardy was formerly the education and training lead at the Estia Centre, South London and Maudsley NHS Foundation Trust. He is a registered nurse in learning disabilities and has worked in mental health and challenging behaviour services for people with learning disabilities for 20 years. He has widely published in these areas and he is the co-editor of the journal Advances in Mental Health and Intellectual Disabilities.