The National Air Traffic Service (Nats) has attributed a major airspace management failure to a rare software defect that triggered the production of corrupted data. The incident, which occurred on September 8 at 10:00 a.m., resulted in a significant reduction of available information for air traffic controllers, forcing the implementation of safety-related restrictions.

The system failure led to the cancellation of over 2,000 flights and left hundreds of thousands of passengers stranded at airports or abroad. While the defect occurred in a "millisecond," the severity of the issue was not fully realized for two and a half hours. Normal operations were not restored until 7:30 p.m. that evening, with subsequent days required to resolve the resulting backlog of displaced aircraft and crew.

Nats Chief Executive Martin Rolfe, who has rejected calls for his resignation, described the defect as "very, very obscure." He apologized for the disruption, emphasizing that the primary objective of maintaining safe skies was never compromised. However, the incident has drawn sharp criticism from industry leaders. Tim Alderslade, chief executive of Airlines UK, stated that the organization is demanding compensation for costs incurred and a "credible plan to improve resilience."

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Transport Secretary Heidi Alexander labeled the disruption "completely unacceptable" and confirmed that the Civil Aviation Authority is conducting a review to determine why the vulnerability remained undetected. This event marks the third national air traffic incident in three years, following similar outages in 2023 and 2025.

Many passengers face limited recourse for their expenses, as the regulator classifies such events as "extraordinary circumstances," which typically exempts airlines from paying standard compensation. Affected travelers, such as Addie Kitson, who incurred significant out-of-pocket costs after being diverted to Sweden, have expressed frustration over the recurring nature of these technical failures.

Source: BBC News