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National Air Traffic Services acknowledged a technical fault in its flight processing system on September 8, 2026, that compelled carriers to cancel more than 1,750 flights while operating UK airspace at reduced capacity. The disruption centred on major airports including Heathrow, Gatwick, Manchester and Birmingham, where Flightradar24 tracking showed nine of the world’s 10 most affected departure points were British facilities. BBC News reported that an additional 327 flights were cancelled the following day as airlines struggled to clear a backlog that extended delays for many passengers into the weekend.
According to the Associated Press, NATS resolved the immediate issue within hours on September 8 but warned of continued ripple effects across 15 UK airports and into European routes. Ryanair said the failure had already affected around 65,000 of its passengers on the first day, prompting the carrier to demand accountability from senior management. The incident follows NATS figures that show the provider safely handled 2.54 million flights across UK airspace in 2025, representing nearly 24 percent of all European air traffic according to Eurocontrol data.
A software error at the Swanwick centre on August 28, 2023, as Simple Flying previously reported, created simultaneous primary and backup failures that disrupted 700,000 passengers on a peak summer travel day. That outage cost airlines more than £100 million in refunds and rebooking expenses after an engineer had to travel to the site to restore operations. A separate radar-related fault on July 30, 2025, then restricted airspace for more than four hours and forced at least 150 cancellations, according to multiple aviation outlets.
Ryanair chief operating officer Neal McMahon told the BBC that repeated system collapses demonstrated ongoing shortcomings in NATS management. “How many more failures do passengers have to suffer before overpaid failure NATS CEO, Martin Rolfe, accepts responsibility for his repeated mismanagement and resigns,” McMahon said. Wizz Air UK managing director Yvonne Moynihan added that three significant incidents required urgent questions about the underlying resilience of the national air traffic infrastructure.
Transport Secretary Heidi Alexander summoned NATS chief executive Martin Rolfe for a briefing and called for a comprehensive investigation to be completed within one week, The Standard reported. Alexander stated she was seeking assurances that lessons from earlier failures had been implemented and that aviation support systems met required standards. The government separately confirmed that Rolfe retained its confidence despite the airline criticism.
NATS apologised to affected travellers and ruled out any malicious activity while pledging close coordination with carriers and airports on recovery efforts. The provider indicated that its core operations had returned to stability by late September 8 although schedule recovery would take several days. Industry assessments from AP News noted that the pattern of outages at the same control centre has intensified demands for stronger contingency measures across the network.
