The UK's Mental Health Act 1983 is a law that provides a framework for the treatment and care of individuals with mental health disorders. It allows for the detention and treatment of people in psychiatric hospitals if they pose a risk to themselves or others. The Act aims to balance the rights of individuals with the need to protect public safety. Under this Act, individuals can be admitted to a hospital for assessment and treatment without their consent in certain circumstances. It also outlines the rights of patients, including the right to appeal against their detention and the right to receive appropriate care and support.