Amazon has been given the green light by the UK Civil Aviation Authority (CAA) to significantly expand its Prime Air drone deliveries in Darlington from 600 customers to around 8,000, laying the foundations for future expansion across the UK.
The world-first approval follows a rigorous safety assessment by the CAA of the Prime Air service and opens the door to further expansion of the service to other towns and cities across the UK.
The Prime Air service, launched in Darlington in early 2026, has been operating MK30 delivery drones under CAA authorisation for beyond-visual-line-of-sight flights in less densely populated areas. Amazon said its new CAA Specific Assurance and Integrity Level 4 (SAIL 4) approval now allows it to expand the service to more Prime customers.
The Prime Air service is available at no extra delivery cost to Prime members who have a garden or driveway within a 7.5 mile radius of Amazon’s Darlington fulfilment centre. At checkout, if the item weighs 5 lbs or less and fits into a large shoebox, the customer can select the Prime Air delivery option.
Theunis Scheepers, Prime Air Europe director, said: “Prime Air is the first in the world to receive a SAIL 4 approval from the UK Civil Aviation Authority.
“Earning it took years of disciplined engineering and a commitment to safety from day one. I want to thank the CAA, who worked alongside us at every step.
“For customers in Darlington it means getting what they need quickly, safely, and reliably, and it is the foundation for bringing Prime Air to more of the UK.”
To grant SAIL 4, the CAA assessed Prime Air’s operation, aircraft, organisation, and approach to risk, and determined the operation met the exacting standards required for this level of authorisation.
Prime Air’s drone, the MK30 aircraft, which holds CAA approval to conduct operations, operates a detect-and-avoid system and uses machine-learning models to continuously monitor the surrounding airspace throughout each flight, recognising other aircraft, people, animals and physical obstacles, and determining whether corrective action is needed.
As it descends to deliver, these systems identify and steer clear of hazards such as clotheslines or trampolines that would not appear on a satellite map.
Amazon said an independent monitoring computer oversees the main flight-control system and, should it detect any irregularity in flight, can instantly hand control to a secondary system and initiate an automated return to base or a safe, controlled landing.
Sophie O’Sullivan, CAA director of future safety and innovation, said: “Innovation is transforming aviation, and the UK Civil Aviation Authority’s role is to ensure that happens safely.
“As technologies such as Amazon’s drone delivery services mature and become more commonplace, we’re helping to create conditions that allow innovation to thrive, while maintaining the high safety standards that underpin UK aviation.
“Amazon achieving a SAIL 4 Operational Authorisation (OA) demonstrates not only the safety and integrity of their aircraft and operation, but also their commitment to innovation and growth in the UK aerospace sector.
“This first in-kind announcement marks another important step towards safely integrating new technologies into UK airspace, supporting growth, and helping to ensure the UK remains a world leader in aerospace innovation.
“It also reflects the wider progress being made as the aviation sector evolves and new technologies become part of everyday operations.”
