This study examines the feasibility (acceptability, usefulness, convenience and cost) of using a new method of detecting hypercholesterolaemia through GP clinics. If the condition is found following a fasting pathology test, close relatives will also be checked. This family tracing will identify new patients with the condition as they stand to benefit most from early treatment. The proposed new approach will allow the condition to be managed by the patient’s GP with support from the hospital specialist.