A technical failure in the United Kingdom’s National Air Traffic Services (NATS) beginning Tuesday, 8 September 2026, led to the cancellation of over 1,346 flights across UK airports on Tuesday and Wednesday combined. Major airports affected included Heathrow, Gatwick, Manchester, and Birmingham, with interconnected airports across Europe and Ireland also reporting delays and cancellations.
Flight Cancellations and Airline Operations Disrupted
British Airways cancelled nearly 550 flights during the disruption, impacting more than 85,000 passengers. The airline rebooked over 60,000 affected customers on alternative flights and operated approximately 80% of its planned schedule on Wednesday despite ongoing disruptions. British Airways also cancelled more than 190 flights on
Wednesday while adjusting its schedules. Ryanair faced cancellations of over 50 flights and reported delays of up to eight hours affecting more than 65,000 passengers. FlightRadar24 recorded 1,055 cancelled flights by 8:00 p.m. Tuesday and an additional 291 cancellations on Wednesday.
Technical Cause and Resolution
NATS identified a significant technical malfunction in its flight data processing systems as the cause of the disruption. The agency issued a statement confirming the system issue was resolved by Tuesday afternoon, denying any cyberattack involvement. “Our system issue is now resolved, we are operating normally and working as hard as possible to clear the backlog of flights,” NATS
said. This failure echoed a similar major system collapse involving UK aviation infrastructure in August 2023.
Government and Industry Response
Transport Secretary Heidi Alexander convened an emergency meeting with NATS CEO Martin Rolfe on Wednesday, demanding a full independent investigation into the cause. The government set a one-week deadline for completion of the probe. The UK government holds a 49% stake in NATS, providing strategic influence over the organisation. The UK Civil Aviation Authority signalled plans to consider regulatory and structural reforms of the air traffic control system. Airline executives, including Ryanair COO Neal McMahon and CEO Michael O’Leary, criticized NATS for repeated failures,
with O’Leary publicly calling for Rolfe’s resignation. Wizz Air and EasyJet also condemned the recurring NATS infrastructure failures as unacceptable.
Passenger Impact and Compensation
The cancellations resulted in tens of thousands of passengers experiencing delays and disruption. Airlines are legally required under UK regulations to provide meals, refreshments, and overnight accommodation when delays extend overnight, regardless of fault. However, as the disruption arose from an air traffic control failure deemed extraordinary circumstances, passengers are generally not entitled to statutory cash compensation. Heathrow Airport paused departures temporarily on Tuesday before resuming operations in phases. Authorities advised passengers to travel to terminals only with confirmed flights.
British Airways offered free flight changes until Sunday, 13 September, for customers affected by the cancellations.
Economic Consequences and Outlook
The August 2023 NATS outage cost UK airlines over £100 million; initial assessments suggest the current technical failure could produce comparable financial impacts. The aviation sector is focusing on clearing the passenger backlog and restoring flight schedules while awaiting the independent investigation’s findings. Industry and regulators will scrutinize the report for evidence of structural underinvestment or software obsolescence within NATS to prevent future operational failures.
