UK Flight Chaos Deepens as Air Traffic Control Failure Triggers More Cancellations

Air passengers across the UK are facing another day of disruption after a major technical failure in the country’s air traffic control system caused more than 1,000 flight cancellations and left hundreds more delayed. The problem affected NATS, the UK’s air traffic control provider, after a fault in its flight data processing system disrupted operations at airports including Heathrow, Gatwick, Stansted, Luton, Manchester and Birmingham. NATS said the technical issue was eventually resolved, but warned that clearing the resulting backlog would take time.

The disruption continued even after the system was restored because aircraft and flight crews were left out of position. Heathrow, one of the world’s busiest airports, suspended arrivals for the remainder of Tuesday while departures gradually resumed. Further cancellations were also expected as airlines attempted to return their schedules to normal. Flight tracking data showed the scale of the disruption, with around 1,300 flights cancelled on Tuesday and hundreds of departures and arrivals delayed. More than 100 additional cancellations had already been recorded for Wednesday, with Heathrow particularly affected.

Airlines have reacted angrily to the failure. Ryanair said about 150,000 of its passengers had been affected by delays of up to eight hours and called for NATS chief executive Martin Rolfe to resign. Wizz Air also demanded urgent reform, arguing that repeated failures should not leave airlines and passengers bearing the consequences. NATS has said that passenger safety was never compromised and that the incident was not the result of a cyberattack. Its chief executive said the precise cause was still being investigated, while describing the recovery as unusually complex.

The failure has revived concerns about the resilience of Britain’s aviation infrastructure. A similar NATS processing failure in 2023 caused widespread disruption and cost airlines more than £100 million, prompting the aviation regulator to demand improvements to contingency arrangements. For passengers, however, the immediate concern is whether their flights will operate as scheduled. Airports and airlines are advising travellers to check their flight status before travelling, as the effects of the technical failure continue to ripple through the UK’s tightly connected aviation network.