His primary research interests are in CT screening and lung cancer epidemiology. He is leading the novel recruitment work package in the 4-in-the-Lung-Run project. He was lead respiratory physician on the UK CT lung cancer screening trial (UKLS). He has published over 240 papers, including three influential guidelines. He has held the positions of Honorary Secretary of the British Thoracic Society, Clinical Lead on the NICE Lung Cancer Guideline Development Group, Chair of the Quality Standards Group on Lung Cancer, Clinical Director of the East Midlands Cancer Alliance and Chair of the Screening Prevention and Early Diagnosis Group for the National Cancer Research Institute. . He enjoys time with his family and is a keen windsurfer and advanced instructor.