The UK is well suited to test this hypothesis because of its well established system of Rapid Access Chest Pain Clinics (RACPC). The majority of patients presenting with stable chest pain (CP) that is of suspected cardiac origin are referred to such clinics, with a mandated access time within 2 weeks. The majority of such clinics work to the algorithm recommended in the NICE guidelines for Chest Pain of Recent Onset (March 2010). Within this guideline, patients are stratified according to their risk profile and pre-test likelihood of coronary artery disease (CAD) to outcomes that include discharge, stress test, CTCA (computed tomography coronary angiography), CT (computed tomography) coronary calcium score and invasive coronary angiogram.