Rayner was appointed to various UK government committees on health, and resultantly was the author of a chapter in "The Future of the NHS". Despite being president of the Patients Association, Rayner used private health care. was a member of the Prime Minister's Commission on Nursing; the Labour government's Royal Commission on the Care of the Elderly. In 1999 Rayner was appointed to a committee responsible for reviewing the medical conditions at Holloway Prison, London, at the direction of Paul Boateng who was then the Minister for Prisons. The recommendations of this committee led to far reaching changes in the provision of medical care within Holloway.