Dr Sean Preston is a leading consultant gastroenterologist with extensive expertise in the diagnosis and management of digestive disorders. He is Medical Director and Director of Endoscopy at The Princess Grace Hospital and serves as Chair of Digestive Diseases and Renal Department for HCA Healthcare UK. With a strong background in clinical practice, research, and medical leadership, he is recognised for his contributions to gastrointestinal health and endoscopic innovation.

He specialises in the management of conditions such as gastro-oesophageal reflux disease (GORD), Barrett’s oesophagus, irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), and functional gastrointestinal disorders. His clinical approach integrates advanced diagnostic techniques with personalised treatment plans, including dietary interventions and the use of prebiotics and probiotics to optimise gut health. He is particularly focused on the role of the gastrointestinal microbiota in overall wellbeing and disease prevention.

Dr Preston has extensive experience in endoscopic procedures, including diagnostic and therapeutic gastroscopy, colonoscopy, and endoscopic ultrasound. He is an accredited colonoscopist for the National Bowel Cancer Screening Programme, a position that requires continuous performance monitoring and adherence to rigorous quality standards. His endoscopic expertise also extends to the early detection and management of gastrointestinal cancers, an area in which he has published widely. His PhD research at Cancer Research UK investigated the role of stem cells in gastrointestinal malignancies, leading to several influential publications in the field.

In addition to his clinical and research work, Dr Preston has held significant leadership roles in medical education and professional organisations. He was President of the Gastroenterology and Hepatology Section of the Royal Society of Medicine from 2015 to 2017 and previously chaired the Specialists’ Committee for the Independent Doctors’ Federation. He is also a Deputy Director of the North East London NHS Bowel Cancer Screening Programme, contributing to public health initiatives aimed at early cancer detection and prevention.

Recognised for his excellence in patient care and medical innovation, he has been featured in leading publications, including the Tatler Doctors Guide and Spears 500 Top Recommended UK Private Doctors and Surgeons. As a founding partner of London Digestive Health at the London Digestive Centre, he collaborates with a multidisciplinary team of gastroenterologists, surgeons, radiologists, oncologists, and dietitians to deliver comprehensive, patient-centred care.