Event Brief
NATS says UK air traffic outage was caused by software defect
By The BriefBrief · Sources (5)
Filed: Sep 18, 2026 at 10:06 AM ET
Summary: NATS said a UK air traffic control outage that disrupted travel last week was caused by a software defect in a specific part of its flight data system. The incident led to about 2,000 flight cancellations and days of disruption, with NATS tracing it to a small subsection of coding and implementing mitigation while a permanent fix is safety tested.
WHO: NATS CEO Martin Rolfe
WHAT: NATS attributed a UK air traffic control outage to a software defect in its flight data system and said mitigation is in place while a permanent fix is safety tested and deployed.
WHEN: Sep 18, 2026
WHERE: United Kingdom
WHY: A software issue in a specific part of NATS’s flight data system, traced to a small subsection of coding, caused the outage.
How this brief is built: The BriefBrief uses multi-source information fusion to correlate reporting across sources, identify related developments, and continuously update a structured WHO, WHAT, WHEN, WHERE and WHY event picture. Pattern arcs, source analysis, and velocity indicators provide deeper analysis in our MI Console.
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