1. Department of Surgery, Guy's and St Thomas' Oesophago‐Gastric Centre, London, UK
2. Division of Cancer Studies, King's College London, London, UK
3. Medical Research Council Unit for Lifelong Health and Ageing, University College London, London, UK
4. Cancer Epidemiology and Population Health Associated Research Group, King's College London, London, UK
5. Department of Oncology, Guy's and St Thomas' Hospital, London, UK
6. Upper Gastrointestinal Surgery, Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
7. Department of Surgery, Guy's and St Thomas' Oesophago‐Gastric Centre London UK
8. Department of Oncology, Guy's and St Thomas Hospital London UK
9. Department of Pathology, Guy's and St Thomas' Hospital London UK
10. Department of Radiology, Guy's and St Thomas' Hospital London UK
11. Cancer Imaging, School of Biomedical Engineering and Imaging Sciences, King's College London London UK
12. Department of Cellular Pathology, Guy's and St Thomas' Hospital London UK
13. Department of Gastroenterology, Guy's and St Thomas' Hospital London UK