This book draws on both the historical context and contemporary research evidence to present the roles of the Mental Health Social Worker, the Approved Mental Health Professional and Best Interest Assessor, within an ethical framework. Codes of practice and statutory legal requirements, such as the Mental Health Act, Mental Capacity Act and the Human Rights Act, are all considered and linked to a competency-based approach that will assist both those in training and those in practice to understand the dilemmas, complexities and conflicts that are evident in the practice environment.