A technical failure in National Air Traffic Services’ (NATS) flight data processing system on September 8-9, 2026, triggered widespread flight cancellations exceeding 2,000 across the United Kingdom. By 8:00 p.m. on Tuesday, FlightRadar24 recorded 1,055 cancellations, with a further 291 on Wednesday as airlines struggled to recover operations.
British Airways cancelled nearly 550 flights over the two days, impacting more than 85,000 customers, and conducted over 190 cancellations on Wednesday to reposition crews and aircraft. The airline successfully rebooked over 60,000 passengers. Ryanair cancelled over 50 flights, reporting delays of up to eight hours that affected upwards of 65,000 travelers.
Official responses and industry reactions
NATS engineers resolved the system issue by Tuesday afternoon but the disruption extended into September 10. NATS confirmed the fault was technical and ruled out cyberattack involvement. The agency stated, “Our system issue is now resolved, we are operating normally and working as hard as possible to clear the backlog of flights.” Transport Secretary Heidi Alexander demanded a full independent investigation within one week and held an emergency meeting with NATS Chief Executive Martin Rolfe amid calls for his resignation.
Ryanair’s Chief Operations Officer Neal McMahon criticized repeated NATS system failures, while Wizz Air described the air traffic control infrastructure
as “simply not fit for purpose.” EasyJet condemned the recurrent outages as entirely unacceptable. The UK government holds a 49 percent stake in NATS and has launched an urgent inquiry into the cause of the outages.
Major airports affected and operational impacts
Key UK airports including Heathrow, Gatwick, Manchester, and Birmingham absorbed the bulk of the cancellations and delays. Heathrow temporarily halted departures on Tuesday before initiating a phased resumption of flights. The disruption also affected connections with European and Irish airports linked to the UK network, causing cascading delays throughout the region.
Regulatory framework and passenger rights
Under UK aviation regulations, passengers impacted by cancellations extending overnight are entitled to
meals, refreshments, and accommodations. However, because the disruption originated from a national air traffic control provider’s technical failure—classified as an extraordinary circumstance—statutory cash compensation claims are generally inapplicable. Airlines have applied these rules in managing passengers affected by the outage.
Financial impact and systemic reform demands
This outage follows a similar NATS infrastructure failure in August 2023 that reportedly cost the airline industry an estimated £100 million. Early assessments indicate comparable financial losses from the current disruption. The UK Civil Aviation Authority indicated plans to evaluate whether regulatory and structural reforms of air traffic services are necessary in the aftermath. The incident has intensified scrutiny on
NATS’ operational resilience and infrastructure.
