On Tuesday, September 8, 2026, a technical failure in the flight data processing system operated by National Air Traffic Services (NATS) resulted in the cancellation of approximately 1,300 flights across UK airports.
The disruption affected major airports including London Heathrow, Gatwick, Luton, Stansted, Manchester, Birmingham, Belfast City, Edinburgh, East Midlands, and Jersey. Arrivals at Heathrow were suspended for the remainder of Tuesday while departures resumed later that day. On Wednesday, September 9, at least 177 flights, mostly at Heathrow, were cancelled as airlines managed the backlog. Airlines continued to reposition aircraft and crews, prolonging operational difficulties.
Impact on UK Airports and Airlines
Multiple UK airports experienced
extensive delays and cancellations following the NATS system fault. Heathrow led cancellations with the majority of Wednesday’s 177 flight cancellations reportedly there, while Gatwick, Manchester, and Stansted also faced ongoing disruption. The failure had knock-on effects across European airports. Ryanair, which cancelled over 50 flights and reported delays up to eight hours, disclosed more than 65,000 passengers were affected by the incident.
Resolution Efforts and Official Responses
NATS resolved the technical issue after a complex and prolonged recovery effort. Martin Rolfe, CEO of NATS, apologized for the disruption and announced a full investigation into the failure. In a statement, NATS said, “Recovery from today’s system
issue has taken longer than we had hoped. Our system issue is now resolved, we are operating normally and working as hard as possible to clear the backlog of flights.” Heathrow Airport advised passengers on its official X account to verify flight status before traveling, warning that some disruption may continue while aircraft and crews were repositioned.
Passenger Impact and Compensation
Passengers affected by the cancellations and delays may be eligible for compensation under UK Civil Aviation Authority rules, with payouts ranging from £220 to £520 depending on the delay length. Delays exceeding five hours allow travelers the option to forgo travel and request
a refund. While air traffic control faults are generally treated as extraordinary circumstances exempting airlines from cash compensation, many airlines offer vouchers for food and transport or hotel stays when necessary. Ryanair’s Chief Operating Officer Neal McMahon criticized NATS leadership, stating on X that the provider “once again failed UK travellers and airlines.” Passengers are urged to check their flight status with their airlines and monitor official NATS updates.
Official Statements and Industry Reactions
The UK Civil Aviation Authority demanded a full report from NATS on the failure and indicated the incident may prompt regulatory reforms. NATS described the recovery as “a very complex process”
affecting the entire aviation network. Aviation analyst John Strickland commented, “A few hours of outage may on the face of it sound limited but the impact is enormous when a substantial number of airports across the UK are affected.” Ryanair’s public rebuke highlights frustrations within the airline industry stemming from recurring NATS flight processing issues, including a similar failure three years earlier.
Current Situation and Unknowns
As of September 10, detailed data on the exact number of current cancellations or delays at individual airports beyond Heathrow and Gatwick remain unavailable. Specific airline-by-airline figures aside from Ryanair’s reported cancellations have not been disclosed. Technical aspects
of the flight data processing fault remain undisclosed. Passenger disruptions and recovery continue as airlines adjust schedules and operations in response to the backlog generated by the September 8 failure.
