UK Air Traffic Outage Piles Pressure on NATS After 2,000 Cancellations
More than 2,000 UK flights were cancelled across two days after a NATS processing-system failure, prompting ministerial scrutiny and renewed airline calls for leadership changes.
UK summons air traffic boss after major outage as flights slowly resume
Airlines scramble to dig out from tech problems that canceled 1,750 flights in the UK
Calls for NATS boss to resign after UK air traffic chaos
Nats boss summoned by UK transport secretary as flight chaos enters second day
UK air traffic control failure hits 1,300 flights, Nats boss summoned
A backlog spreads beyond the control room
Flights were moving again across Britain on Wednesday, but airlines warned that disruption could take days to unwind after a failure in NATS' flight-data processing system. Aviation analytics firm Cirium counted 1,750 cancellations on Tuesday and another 291 on Wednesday, leaving tens of thousands of passengers affected.bbc Heathrow told travellers to come to the airport only if their flight was confirmed as aircraft and crews were repositioned.bbc +1
The breakdown began around 1 p.m. Tuesday and the processing system was fixed almost four hours later, but accumulated departures and constrained ground space also disrupted arrivals.theguardian The effects crossed borders: Air India reported diversions, delays and cancellations on UK routes, while Qatar Airways warned that services could be delayed or rerouted.cnn
Ministers demand answers as airlines turn on NATS
Transport Secretary Heidi Alexander summoned NATS chief executive Martin Rolfe to explain the outage. Rolfe apologised and promised a full investigation, while Foreign Secretary Ed Miliband called the failure “unacceptable.”bbc The Civil Aviation Authority said it expected a full report and would consider whether reforms were needed to improve reliability.aljazeera
Pressure on Rolfe intensified as Ryanair and Wizz Air questioned whether NATS was fit for purpose. Ryanair said 65,000 of its passengers were disrupted and more than 50 of its flights were cancelled; British Airways said it had to cancel more than 190 services.cnn NATS, a public-private partnership in which the government owns 49%, provides control services at 15 UK airports.bbc
Repeated failures sharpen the reliability test
Rolfe said a cyberattack had been ruled out at this stage and described the fault as something NATS had not encountered before in its 50 years of operation.cnbc He also said the system involved was different from the one behind the August 2023 collapse.bbc That earlier failure disrupted about 700,000 passengers, and a separate radar problem in July 2025 caused more than 150 cancellations.bbc +1
The immediate challenge is operational rather than technical: delayed aircraft, displaced crews and working-time limits can keep cancellations rolling after the system itself is restored. ITV reported extensive delays at Heathrow, Gatwick, Manchester and Birmingham, with disruption also reaching smaller airports and islands.itv The longer-term question is whether the investigation produces tougher resilience requirements. With three major stoppages in just over three years, Wednesday's ministerial meeting puts both NATS' technology and its leadership under unusually direct scrutiny.theguardian