 Professor Keith Simpson was a member of many medical organisations, one of the founders of the British Association in Forensic Medicine, a former president of the Medico-Legal Society, and a member of the council of the Royal College of Pathologists and the Medical Protection Society.He was the only London forensic pathologist to be recognised as a Home Office pathologist and was a member of the Home Office Scientific Advisory Committee.A fellow of the Royal College of Physicians and the Royal College of Pathologists, Professor Simpson received honorary degrees from the universities of Oxford, Edinburgh and Ghent.