Latest News

UK air traffic control outage is caused by software defects, according to operator

The British air traffic control operator NATS announced on Friday that a software bug was responsible for the 'outage' which affected hundreds and thousands of passengers in the past week.

The incident led to the cancellation of 2,000 flights and caused days of disruption. Airlines spent millions of pounds trying to return crews, aircraft and refund passengers.

NATS CEO Martin Rolfe stated that the shutdown wasn't related to a 2023 problem which caused widespread?disruption. Nor was it connected to military intervention, as some media outlets reported last week. He also said that safety was not compromised at any point during the incident.

He said that the problem was caused by a "software issue" in a particular part of our flight-data system. The code for this small section of code has been traced. The issue has been identified, and mitigation measures are in place. A permanent fix will be tested for safety and deployed once the test is complete.

Heidi Alexander, the Transport Minister, who last week had demanded that NATS produce a detailed report and ordered an independent review of the Civil Aviation Authority's findings, called the disruption "completely inacceptable".

She said that she urgently needed to understand why the problem was not discovered and resolved before it created chaos. "It's crucial that our nation's infrastructure is ready for the future."

This incident was a result of a travel chaos in August 2023 that cost airlines PS100 million ($136 millions). In July 2025, NATS also was responsible for a smaller technical problem that caused 150 cancellations.

Since the 2023 failure, Ryanair, Europe’s largest airline, has called on Rolfe repeatedly to resign.

A request from an aircraft for an identification code was followed by a request to perform a "higher priority" activity. This request paused the initial request.

The report stated that "had the higher priority request arrived just one millisecond sooner or later, then the update would have finished normally."

(source: Reuters)