Sir Richard was a gastroenterologist at St Thomas’ Hospital, London for over 30 years. He became a Governor of the Foundation Trust and ran a clinical research laboratory there studying nutritional gastroenterology and publishing over 300 scientific papers.

He was Physician to the Queen for 23 years, becoming Head of the Medical Household, and Treasurer, and later President, of the Royal College of Physicians.

He is an Honorary Fellow of Worcester College, Oxford, and an Honorary Associate Nightingale.

He has served on the boards of the King’s Fund, British Heart Foundation, British Cardiovascular Society, Institute of Psychiatry, Feltham Young Offenders’ Institute, Henry Smith Charity, Thrive, and Royal Medical Foundation of Epsom College. He is currently a Trustee of the National Gardens Scheme and a Patron of Thrive.