In the UK,1 there are 9,000 new cases per year with a 15% 5-year survival.2 Barrett’s oesophagus (BO) is a pre-malignant condition for oesophageal adenocarcinoma that affects 1.6–8% of the UK population.3 BO is defined by histological evidence of epithelial metaplasia from normal stratified squamous epithelium to mucin-secreting columnar epithelium in the distal oesophagus. This evidence concerns the gene MUC5AC and bronchiolitis obliterans syndrome.