Dr Thomas Marjot graduated from Imperial College as runner up for the University of London Gold Medal, before moving to Oxford as an Academic Clinical Fellow in Gastroenterology and Hepatology. He is now a Wellcome Trust Clinical Research Training Fellow at the University of Oxford completing a doctoral degree investigating the pathogenesis and management of metabolic-dysfunction associated fatty liver disease (MAFLD). He is particularly interested in using translational experimental medicine techniques to identify pathways leading to hepatic steatosis. Recently, Dr Marjot has set up an international registry collecting data for patients with COVID-19 and pre-existing chronic liver disease (COVID-Hep) and has written the European Association for Study of the Liver (EASL) updated position paper on managing liver disease during the COVID-19 pandemic. Dr Colleen McGregor graduated from Imperial College London in 2012 with Distinctions and was awarded a First-Class Honours BSc degree in the Medical Sciences of Gastroenterology and Hepatology. She undertook her Foundation and Core Medical Training in London before moving to Oxford as a Specialist Registrar in Gastroenterology and Hepatology. She is now OOPR as a Clinical Research Fellow within the Translational Gastroenterology Unit, University of Oxford. Her research focuses on translating mechanistic insights into personalisation of care in IBD. Her interest in medical education developed through her role as a College Clinical Teaching Fellow at the University. She successfully completed the SCE exam during ST4 and is motivated toward better resourcing and equipping future trainees in their own preparation; she is confident this updated edition will do so. Dr Tim Ambrose is a Consultant Gastroenterologist at Oxford University Hospitals NHS Foundation Trust. He qualified from The University of Edinburgh in 2006 and undertook higher training in Gastroenterology and Hepatology in the Thames Valley region. Additionally, he spent a year undertaking specialist training in Intestinal Rehabilitation at St Mark's Hospital, London, and in Intestinal/Multivisceral Transplant at Addenbrooke's Hospital, Cambridge. Between 2014 and 2018 he completed a DPhil looking at the endocannabinoid system, innate immune responses and inflammatory bowel disease. He was appointed to a substantive consultant post in March 2020. He is currently Training Lead for Oxford and sits on the regional Specialty Training Committee. Professor Simon Travis is a former President of the European Crohn's and Colitis Organisation (ECCO, 2012-2014). He is a Fellow of Linacre College and Consultant Gastroenterologist at Oxford University Hospitals NHS Trust. In 2015 he received the Joanna and David B Sachar International Award, Visiting Professor of Inflammatory Bowel Disease, ICAHN School of Medicine, New York and the Inaugural Distinguished Visiting Professor of IBD, Sydney. In 2020 he received the International Golden OTIS Award from the Polish Society of Gastroenterology. He is currently Chair of the Global Working Group on IBD for ICHOM. Dr Aminda De Silva studied medicine at Imperial College School of Medicine, where he won several prizes. Whilst completing specialist clinical training in gastroenterology he spent 3 years in research in clinical nutrition and inflammatory bowel disease at the Institute of Human Nutrition, University of Southampton. He was appointed to Royal Berkshire NHS Foundation Trust as a consultant Gastroenterologist in June 2009. He was a member of the Royal College of Physician's Nutrition Committee between 2011-19 and the British Society of Gastroenterology Small Bowel and Nutrition committee between 2013-2015. He currently chairs the RCP working party on Oral Feeding Difficulties and Dilemmas and is the Training Programme Director for Thames Valley Gastroenterology. Dr Jeremy Cobbold is Consultant Hepatologist and Clinical Lead for Hepatology at the John Radcliffe Hospital, Oxford University Hospitals NHS Trust and Honorary Senior Clinical Lecturer at the University of Oxford. Dr Cobbold qualified in Medicine from the University of Cambridge and University College London in 2001. He trained in Gastroenterology and Hepatology in London, including at the Royal Free Hospital and St Mary's Hospital, Paddington, before being appointed to a Consultant post in Oxford in 2014. Between 2005 and 2008, Dr Cobbold completed a PhD in imaging technologies for non-invasive assessments of liver diseases at Imperial College London, then as a Clinical Lecturer at Imperial, conducted research into treatment strategies in non-alcoholic fatty liver disease (NAFLD). Dr Cobbold conducts clinical research including clinical trials in liver diseases and lectures nationally and internationally.