Second NATS Failure Leaves Northern Flights in Chaos

• At least 200 flights arriving in or departing from the UK had been cancelled by Monday, according to aviation analysts Cirium.¹
• The fault struck NATS’s Prestwick centre, disrupting flights across Scotland, Northern Ireland and northern England while airports south of Manchester were broadly unaffected.¹
• NATS says the problem was a connectivity failure in part of its systems network, specific to Scottish operations, and unrelated to the software defect behind the 8 September nationwide outage.²
• NATS says engineers fixed the fault, but restrictions and knock-on delays were still being cleared across the network.²
• The government owns 49% of NATS, making it the largest shareholder and giving ministers an effective veto over major decisions.¹

The immediate safety response was to restrict traffic while engineers investigated. That may have prevented a more serious failure, but it left passengers and airlines carrying the cost of a system they do not control. Ryanair said more than 25,000 of its passengers could be affected, while easyJet said the repeated failures raised fresh questions about NATS’s resilience.¹

The two incidents are not technically connected, according to NATS. But two separate failures within a fortnight expose the same public-interest problem: Britain’s airspace depends on infrastructure that can turn a local technical fault into cancellations across several nations and regions. The Civil Aviation Authority has announced an independent review of the earlier 8 September disruption; no equivalent public investigation into Monday’s Prestwick failure had been announced by the time of publication.³

Footnotes

1. Associated Press, “Second technical issue in 2 weeks afflicts UK’s air traffic controller” ↩ ↩² ↩³ ↩⁴

2. NATS, “Technical issue at Prestwick Centre”, 21 September 2026 ↩ ↩²

3. UK Civil Aviation Authority, “CAA statement on passenger compensation following NATS disruption on 8 September” ↩