Introduction. Foreword by Murna Downs.; 1. The Nature of Challenging Behaviour.; 2. Using Psychotropic Medication to Treat Challenging Behaviour.; 3. Psychological and Other Non-pharmacological Approaches.; 4. Conceptual Models Used to Aid Assessment and Treatment.; 5. The Newcastle Service: An Illustration of a Specialist Challenging Behaviour Team Using an Unmet Needs Model.; 6. Case Studies.; 7. Service Development and Provision. References.