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Professor G D Bell trained at St Bartholomew’s Hospital obtaining a double honours degree in his London MB BS finals in 1968.

He was a research fellow at the Royal Postgraduate Medical School, Hammersmith from 1971 to 1974 during which time he studied for a MSc in Biochemistry and a Medical Doctorate. He later was awarded a FRCP at both the London and Edinburgh Royal Colleges of Physicians.

He was appointed a Senior Lecturer and honorary Consultant Physician to the Medical School at Nottingham in 1976. There his research included work on cholesterol metabolism, early statins, bile composition and gallstone dissolution. In 1983 Duncan came to Ipswich replacing Dr John Paulley as Ipswich’s then only gastroenterologist. Successes included setting up a modern Endoscopy Unit, starting a Suffolk branch of the British Digestive Diseases Foundation and his Unit being voted the Hospital Doctor’s ‘Gastroenterology Team of the year’ in 1994. In the 1990s he chaired several National Committees including those on Sedation and Safety for Endoscopic Procedures and the original one on Informed Consent for Gastroenterological procedures. He worked closely with Professors David Heatley and Peter Cochrane from BT. His inventions include the first non-radiological imaging system for colonoscopy (jointly with BT and Sheffield University), the oxygenating mouth guard and the non-invasive C14 urea breath best to detect Helicobacter pylori (HP) infection. Using this test his group performed many of the early studies on HP eradication therapy and re-infection rates.

Duncan moved to the Sunderland Royal Hospital in 1997. He returned to East Anglia in 2002 and worked until retirement at the NNUH in Norwich. There he helped with regional colonoscopy training and the setting up of Norwich’s Colorectal Cancer screening service. He has won the prestigious British Society of Gastroenterology’s Hopkins Endoscopy Prize a record three times.

Duncan is currently an honorary Professor at UEA to the School of Computing Sciences and visiting Professor of Medicine at the 91制片. In the past he has been a Royal College of Surgeons Hunterian Professor, a Professor of Gastroenterology at Sunderland University and a visiting Professor in Electrical and Electronic Engineering at Newcastle University. He was awarded a University Doctorate (honoris causa) in 2015 jointly by the Universities of Essex and the UEA for his “services to Medicine”.

He has more than 140 peer reviewed papers, 300 publications and currently, according to Google Scholar, more than 10,100 citations to his work. Now over 80 years of age, he is still an active researcher. His present research interests at the 91制片 and UEA include 3-D printing, medical imaging, AI and X-ray micro-computerised tomography. He is currently working with both Nottingham University and Nottingham Trent University on the use of insects as sustainable sources of food and feed as well as various other insect-related studies jointly with QMUL, Cambridge University and UEA.