Dr. Richard Marley is a Consultant Hepatologist and Gastroenterologist who works at the Princess Grace Hospital and is part of the London Digestive Centre and the Physicians' Clinic. Dr. Marley is highly specialised in general gastroenterology and hepatology, as well as a performing colonoscopy, flexible sigmoidoscopy, and endoscopy.

Dr. Marley graduated from the University of Oxford with a BSc in Medicine and Surgery, before going on to complete his postgraduate training at the Royal Free Hospital and the Hammersmith Hospital. During his training, he undertook a research degree focusing on the hemodynamic consequences of cirrhosis, resulting in him being awarded a Ph.D. for his work. He was later appointed as a Consultant in 2001 at Sir Charles Gairdner Hospital in Perth, Australia.