The Association of Child and Adolescent Psychotherapists (ACP) is the main professional body for psychoanalytic child and adolescent psychotherapists in the UK and is registered with the Professional Standards Authority (PSA). It was established in 1949 and has over 900 members working in the UK and abroad. Psychoanalytic psychotherapy is internationally recognised and as strongly evidenced as many of the more common treatment models people may be more familiar with. ACP registered child psychotherapists have completed an NHS child mental health based training which lasts for at least four years. ACP members work with children, adolescents, parents and families, individually or in groups, with a range of complex psychological difficulties and disorders.