The Mental Health Review Tribunal is a specialist quasi-judicial body constituted under the Mental Health Act 2007. It has a wide range of powers that enable it to conduct mental health inquiries, make and review orders, and to hear some appeals, about the treatment and care of people with a mental illness. The Tribunal’s decisions can involve the consideration of quite complex issues, and can impact directly on people’s lives, health and liberty. In making its decisions, the Tribunal seeks to balance several sets of often competing rights - the individual’s right to liberty and safety and to freedom from unnecessary intervention, the individual’s right to treatment, protection and care, and the right of the community to safety and protection. Given the importance of these decisions, it is essential that the Tribunal receives the very best evidence available when hearing applications and making its decisions.