Amazon says Prime Air gets first SAIL 4 drone approval from UK regulator

Amazon announced on 10 November 2026 that Prime Air received a SAIL 4 Operating Authorisation and a SAIL 4 Flightworthiness Validation from the UK Civil Aviation Authority in Darlington, in the north east of England. Amazon says it is the first operator in the world to get this approval. The approvals apply to Prime Air operations in the town.

What SAIL 4 means

SAIL means Specific Assurance and Integrity Level, a risk level for advanced drone flights under the UK's SORA method. SAIL 4 is medium to high risk, and the operator must show strong technical controls, system integrity and safety management. To grant it, the CAA assessed Prime Air's operation, aircraft, organisation and approach to risk.

More homes in Darlington

Prime Air started in Darlington in early 2026. It flew beyond visual line of sight under CAA approval, over less busy areas. With SAIL 4, it can now fly over more of the town, including busier areas, and eligible customers grow from about 600 to about 8,000.

Deliveries are in under two hours, at no extra cost for Prime members, and customers pick Prime Air at checkout. Customers need a garden or driveway within 7.5 miles (12 km) of the Darlington fulfilment centre, and items must weigh up to 5 lb (2.2 kg) and fit in a large shoebox. Theunis Scheepers, Director, Prime Air Europe, said the approval is "the foundation for bringing Prime Air to more of the UK".

The MK30 drone

The MK30 uses a detect and avoid system with machine learning to spot other aircraft, people, animals and obstacles. When it descends to deliver, it steers clear of things like clotheslines and trampolines. A separate monitoring computer can hand control to a backup system and start an automatic return or a controlled landing.

On The Flying Engineer

Read more about the UK Civil Aviation Authority on its page. Other drone makers and operators are on the drone companies page. The drone industry also meets in London at DroneX Trade Show and Conference 2027.

Source: Amazon