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Dr Jason Dunn, Consultant Gastroenterologist, is currently based in London working within the Guy's and St Thomas' Hospitals and privately within the London Bridge Hospital. He is highly specialised in therapeutic endoscopy, parenteral nutrition in oncology/palliative care, as well as the treatment of early Upper GI cancer, and Barrett's oesophagus. He has excellent experience in performing Endoscopic Mucosal Resection (EMR) and Radiofrequency Ablation (RFA) techniques, PEG tube insertion as well as HALO RFA for Barrett's oesophagus.

During his studies, he was awarded the CRUK clinical fellowship at UCL examining the use of optical diagnostics and minimally invasive therapies for the treatment of Barrett's oesophagus. He was later awarded a PhD for this work and is still invited to present his findings at conferences around the world. His continued work in the field of Barrett's oesophagus, and biomarkers to predict cancer progression has won him several awards. His research has resulted in numerous publications in high-impact medical journals and several book chapters. He continues to contribute back to medical education by holding the position of Honorary Senior Lecturer at Kings College London and Oslo University.

Dr Dunn has had a very successful career in which he has established a regional Endo-therapy centre at St Thomas for the South East region, written guidelines for the management of Barrett's oesophagus, and been Clinical Lead for Endoscopy at Guy's and St Thomas' Hospitals. Additionally, he is also the Research Lead for the Oesophageal Section of the British Society of Gastroenterology and an advisor to the charity- Action against Heartburn.