Frank Sullivan, MBChB, FRCP, FRCGP, PhD, University of St. Andrews, St. Andrews, UK, tells us about the Early detection of Cancer of the Lung Scotland (ECLS) study (NCT01925625), a randomized controlled trial of those at high risk of developing lung cancer. The EarlyCDT Lung blood test was used, followed by X-ray and CT scanning, to assess the test’s ability to reduce the incidence of patients with late-stage lung cancer or unclassified presentation at diagnosis compared to standard practice. This interview took place at the 18th British Thoracic Oncology Group (BTOG) 2020 congress held in Dublin, UK.