A technical failure in NATS’s flight data processing system at the Swanwick control centre sparked widespread cancellations and delays across at least 15 UK airports on September 8, 2026. More than 1,000 flights were impacted, grounding departing services and disrupting air traffic throughout the country.
Flight Disruptions at Major UK Airports
Approximately 490 departing flights were delayed as of 15:18 GMT across Heathrow, Gatwick, London City, Luton, Edinburgh, and Bristol airports, with a further 525 arrivals cancelled or delayed at these locations. Heathrow Airport alone experienced 38 of 661 scheduled arrivals cancelled or unable to operate. British Airways cancelled 16 of its 333 scheduled Heathrow departures
and over 100 flights nationwide. Ryanair halted more than 50 flights affecting over 65,000 passengers, while Wizz Air called for urgent reform of NATS. The disruption also extended to Manchester, Birmingham, Glasgow, Aberdeen, East Midlands, and London Stansted airports.
Passenger Impact and Flight Diversions
Inbound flights to Heathrow were halted for about two hours, forcing some aircraft into holding patterns or diversions to Brussels, Amsterdam, and Paris. Passengers reported being confined on planes for hours, receiving poor communication from airlines, and having to secure accommodation without airline assistance, particularly notable at Berlin Brandenburg Airport after British Airways cancellations. Thousands of travellers faced delays up to
eight hours, complicated itineraries, and last-minute rerouting.
Official Responses and Airline Reactions
NATS stated that the technical fault in their flight data processing system has been fixed and the system was recovering, working closely with airlines and airports to clear the backlog. British Airways confirmed cancellations were beyond their control and said it was rebooking affected passengers. Ryanair’s COO Neal McMahon demanded the resignation of NATS CEO Martin Rolfe, citing repeated failures and asking, “How many more failures do passengers have to suffer before overpaid failure NATS CEO, Martin Rolfe, accepts responsibility and resigns?” Wizz Air described NATS as “simply not fit for purpose” and
urged immediate reform. The UK Civil Aviation Authority will require a full incident report from NATS and decide if further regulatory action is necessary. UK Transport Secretary Heidi Alexander apologized to passengers for the disruption.
Context of Recurrent Failures
This incident marks the third major disruption to the UK’s air traffic control system within three years. In August 2023, a fault in flight plan processing caused 1,600 cancellations impacting 700,000 passengers and costing the industry around £100 million. An independent investigation released 34 recommendations for NATS to improve contingency planning and communication. A radar issue at Swanwick in July 2025 caused more than four
hours of disruption. Despite these findings and recommendations, the September 8 failure revealed ongoing vulnerabilities in the UK’s air traffic infrastructure.
