A major air traffic control failure that grounded thousands of flights across the UK earlier this week was reportedly triggered by “spurious” flight data submitted by a military aircraft, raising fresh questions over the resilience of Britain’s aviation infrastructure.
More than 2,000 flights were cancelled during the disruption, affecting hundreds of thousands of passengers after the flight processing system operated by National Air Traffic Services (Nats) shut down for around four hours.
Military Flight Plan Reportedly Triggered System Failure
According to the Financial Times, four people briefed on the incident said the shutdown was triggered by a flight plan submitted by a UK military aircraft.
The data reportedly caused a serious failure within the air traffic control systems used by Nats, with the problem remaining unresolved for several hours.
The Ministry of Defence has rejected suggestions that the military was at fault.
A spokesperson from the MoD said: “We do not believe there’s any indication of an error on the part of the military. This is subject to the live Nats investigation, so it’d be inappropriate for us to comment further while that’s ongoing.”
Questions Raised Over Nats Backup Systems
The Financial Times also reported that Nats operations officer Kathryn Leahy contacted operations managers at several airports and airlines during the disruption.
According to the report, “tensions boiled over” after Leahy told them that the flight processing system did not have a dedicated backup. Nats was reportedly in the middle of a “complete overhaul of its systems”, while the volume of information retained by the organisation meant duplicating the data would cost “vast amounts”.
The scale of the disruption has increased scrutiny of Nats chief executive Martin Rolfe.
Transport Secretary Orders Review Into Air Traffic Failure
Transport Secretary Heidi Alexander summoned Rolfe to a meeting following the outage.
Alexander said she did “not believe the issue was unavoidable” and was understood to have given the Nats chief executive a week to provide a report explaining what caused the shutdown.
An independent review by the Civil Aviation Authority (CAA) has also been commissioned to examine the incident and the resilience of the UK’s air traffic control infrastructure.
The disruption was the most serious incident affecting British commercial airspace since August 2023, when a technical failure resulted in almost 1,600 flights being delayed.
Following that incident, the CAA issued 34 recommendations aimed at strengthening Nats systems and preventing a repeat of similar disruption. All of those recommendations were said to have been fully implemented.
Cyber-Attack Ruled Out
Rolfe has ruled out a cyber-attack, which had initially been considered as a possible cause.
He said he “believes we’ve never seen an incident happen more than once, so this will be something different that we’ve never seen in 50 years of operation”.
However, the latest outage has prompted renewed criticism from airlines, with some calling for Rolfe to resign or be dismissed.
Ryanair chief executive Michael O’Leary accused Rolfe of “telling lies to save his own skin” and described his position as “untenable”.
O’Leary added: “We don’t need more investigations, we don’t need more reports and we don’t need another parliamentary committee hearing where Martin Rolfe will promise change, will promise resilience and will promise an effective backup system.”
Thousands of Passengers Face Severe Disruption
The system failure caused widespread disruption across the UK aviation network. Some aircraft carrying passengers remained on the ground for more than four hours while awaiting further information.
Flights scheduled to arrive at British airports were also diverted, with some aircraft reportedly forced to land in Germany.
Despite the scale of the disruption, affected passengers are understood to be unlikely to qualify for compensation because delays caused by air traffic control failures can fall under “extraordinary circumstances”.
Airlines may nevertheless have obligations to provide affected passengers with assistance, including food, accommodation or alternative travel arrangements, depending on individual circumstances.
Investigation to Focus on Resilience of UK Air Traffic Control
The Nats investigation and independent CAA review are expected to examine how a single flight plan could contribute to such extensive disruption and whether existing backup arrangements were sufficient.
With more than 2,000 flights cancelled and hundreds of thousands of passengers affected, the incident has renewed scrutiny of the resilience of the systems responsible for managing some of the busiest commercial airspace in Europe.
Graham Greene is a contributor to Dealmakerz, covering news, politics, business, technology, sport, entertainment, and lifestyle. He focuses on clear, accurate reporting and useful information that helps readers stay informed about current affairs and developments that matter to them. His work highlights relevant stories, emerging trends, and key issues, presenting them in a balanced, accessible, and reader-friendly way.
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