Doctors, lawyers and other professionals often need to make an assessment of a person's mental capacity. This book helps to support these professionals by giving them a fuller understanding of the law in all situations where an assessment of capacity may be needed, clarifying the roles of professionals and providing an aid to communication both between them and with the person being assessed. Some of those situations are covered by the Mental Capacity Act 2005, but some are covered by other tests set down by the law. Written by experts from a variety of disciplines, Assessment of Mental Capacity combines clarity as to the law with a practical, jargon-free approach to provide guidelines on issues ranging from medical treatment to making a will, sexual decisionmaking and capacity in the context of the Mental Health Act 1983. The fifth edition has been updated and expanded to include: recent case law, including the first Supreme Court case on the approach to mental capacity in the Mental Capacity Act 2005 research-based guidance about complex capacity assessment the changes to be brought in by the Mental Capacity (Amendment) Act 2019 a new chapter on supporting legal capacity, taking into account the UN Convention on the Rights of Persons with Disabilities.