Fixed compensation
Do not assume it is automatically due. The cause, applicable passenger-rights regime and the airline's response all matter.
UK air traffic control failure · 8 September 2026
UK NATS air traffic control outage: software defect confirmed after around 2,000 flight cancellations
NATS has confirmed that a software defect in its flight data system caused the major UK air traffic control outage on 8 September 2026. The failure triggered restrictions across UK airspace, disrupting major airports including Heathrow, Gatwick, Manchester and Stansted. Around 2,000 flights were cancelled and hundreds of thousands of passengers were affected, with knock-on disruption continuing after the system returned to normal operation.
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Use your actual itinerary and operating airline to check which passenger rights may apply. It takes you from this incident briefing to a flight-specific assessment.
Check my affected flight →What happened
Reuters reported on 18 September that NATS identified a specific software defect as the cause of the outage and said mitigation measures are in place while a permanent fix is tested. Contemporary reporting on 8 September confirmed restrictions and delays at major UK airports. The UK Civil Aviation Authority has separately confirmed that the Government asked it to conduct an independent review of the disruption and has reminded airlines of their passenger-care obligations.
Operational conditions can change quickly. Check the airline and airport for live status before travelling.
Compensation is only one part of your rights
A software defect does not automatically mean UK261 fixed compensation is payable. The key distinction is who controlled the failed system. The UK Civil Aviation Authority says ordinary technical problems within an airline can fall outside the extraordinary-circumstances defence, but it has specifically said disruption directly caused by the 8 September NATS outage — including direct knock-on effects — is likely to be extraordinary because NATS air traffic control is external to the airline. Fixed compensation is therefore unlikely where that outage was the actual cause, although every claim remains fact-specific. Refund, rerouting and care rights are separate: cancelled passengers must be offered the applicable refund or rerouting choice, and qualifying passengers can still be owed reasonable meals, refreshments, accommodation and related care.
Refund or rerouting
A cancellation can create travel-remedy rights even where an extraordinary circumstance prevents fixed compensation.
Care and expenses
Where the applicable rules provide a duty of care, reasonable meals, accommodation or transport can remain separate from compensation.
What to do now
If your flight was affected, keep your original booking, boarding documents, airline messages, the exact reason given for the disruption, replacement-flight details, actual arrival time and itemised receipts. The cause matters: do not accept a generic reference to a technical problem without checking whether the airline says your flight was directly affected by the external NATS outage or by a separate airline-controlled problem. If care or suitable rerouting was not provided directly, retain evidence of reasonable costs before requesting reimbursement.
Check the facts of your flight
AeroDue separates the cause, itinerary and operating airline so passengers do not confuse an airport-wide incident with an automatic compensation result.
Check my affected flight →Sources used for this briefing
NATS — technical issue updates
Reuters — NATS confirms software defect caused 8 September outage
UK Civil Aviation Authority — passenger rights following 8 September NATS disruption
UK Civil Aviation Authority — when technical problems can and cannot be extraordinary circumstances
AeroDue provides passenger-rights intelligence. It does not operate airports, provide live flight status, process claims or guarantee compensation.