Inclusion Criteria:  Age ≥ 18 years Stable chest pain and the patient underwent CCTA which demonstrated ≥50% but less than 90% stenosis in any major epicardial vessel with a diameter ≥ 2 mm.  Exclusion Criteria:  Inability to provide informed consent Unstable angina according to ESC guidelines Unstable clinical status Expected inability to complete follow-up and comply with follow-up aspects of the protocol History of coronary revascularisation Non-invasive or invasive diagnostic testing for CAD within the past 12 months (with the exception of exercise ECG) Unsuitable for revascularisation if required (for example due to comorbidities or anatomical features) Poor CT quality with expected inability to perform FFRct analysis