The CAA A2 Certificate of Competency (A2CofC) and the PDRA01 qualification are both drone pilot certifications issued by the Civil Aviation Authority (CAA) in the United Kingdom. However, there are some differences between the two: In conclusion, both the A2CofC and the PDRA01 certifications demonstrate the competency of drone pilots, but they have different scopes, prerequisites, and purposes. Drone pilots may need to obtain both certifications, depending on their intended use of drones.