On 21 September 2026, a second major air traffic control failure at the National Air Traffic Services (NATS) Prestwick control centre in Scotland led to a surge in flight cancellations affecting UK airports. The technical fault disrupted air traffic across Scotland, Northern Ireland, and northern England.
According to Cirium data, 227 flights had been cancelled by late afternoon due to the Prestwick system failure. Among the airports impacted were Manchester, Edinburgh, and Belfast. Ryanair reported that over 25,000 of its passengers experienced delays or cancellations on that day.
Airlines Raise Concerns and Call for Leadership Changes
Following the disruption, British Airways, easyJet, Jet2, and Ryanair expressed concern about
the resilience of UK air traffic control systems. Ryanair publicly called for the resignation of NATS CEO Martin Rolfe. EasyJet questioned the robustness of the UK’s air traffic infrastructure in light of the repeated failures.
The first NATS system failure occurred on 8 September 2026 and caused nearly 2,100 flight cancellations in the UK. British Airways alone cancelled almost 550 flights on that day, affecting more than 85,000 customers. Heathrow Airport was heavily impacted during the earlier outage.
Causes and Investigation Status
NATS stated the technical fault on 21 September was unrelated to the software defect at Prestige center that caused the 8 September
outage. The earlier failure involved a software issue with the allocation of codes to individual aircraft, according to preliminary investigations. The specific technical cause of the 21 September failure has not been disclosed.
Passenger Impact and Regulatory Actions
The cancellations and delays on 21 September disrupted passenger travel plans including connections involving hotels, transfers, cruises, and tours. Airlines faced challenges with stranded aircraft, crew duty time restrictions, and lost airport slots.
The UK Civil Aviation Authority indicated the 21 September disruption would likely be classified as ‘extraordinary circumstances,’ limiting airlines’ obligations for statutory passenger compensation. Transport Secretary Heidi Alexander commissioned an independent review by the
Civil Aviation Authority following the first failure, a process now intensified by the second incident.
Operational and Industry Implications
Repeated air traffic control failures highlight operational vulnerabilities in one of Europe’s busiest aviation markets. Disruptions on this scale affect various travel sectors, including corporate and event travel, compounding costs for airlines as they recover from stranded crews and rebuild schedules.
The second failure increases pressure on NATS to improve redundancy, technology, and contingency measures to restore confidence in UK air traffic control resilience.
