UK Air Traffic Control System Suffers Second Major Outage This Month

UK airports experienced significant disruption on September 21 due to a technical issue at the National Air Traffic Services (NATS) control center in Prestwick, Scotland. The problem, described as a 'connectivity issue,' led to hundreds of flights being grounded, with 35 departures from the UK and 37 arrivals into Britain cancelled, according to aviation analytics firm Cirium.

This incident marks the second major technical failure at NATS this month. On September 8, a similar issue with its 'flight processing system' caused over 2,000 flight cancellations at airports including London Heathrow and Gatwick. NATS has stated that the September 21 issue was not related to the earlier software defect.

Impact on Passengers and Airlines

The latest disruption caused delays and cancellations across major airports in Scotland, Northern Ireland, and the north of England. Airports including Glasgow, Prestwick, Edinburgh, London City, Heathrow, Luton, Manchester, Liverpool, Bristol, and Belfast reported affected flights. EasyJet was identified as the most impacted airline, followed by British Airways, Loganair, Ryanair, Aer Lingus, and KLM.

While NATS has confirmed the technical issue has been resolved, airlines are still working through the operational consequences. Tomasz Pawliszyn, CEO of AirHelp, noted that passengers might continue to experience delays and cancellations. He emphasized the need for clear communication from airlines and airports and greater passenger awareness of their rights.

Passenger Rights and Compensation

Passengers affected by delays of three hours or more are entitled to food and drink from their airline. For overnight delays, airlines are expected to provide accommodation or reimburse reasonable costs if passengers arrange their own. If a flight is delayed by more than five hours, passengers have the option to cancel their travel and receive a full refund.

In the event of a flight cancellation, UK261 regulations entitle passengers to a full refund or an alternative flight. Airlines may also have obligations to provide assistance during lengthy delays. Travel insurance policies might cover additional expenses such as accommodation, transport costs, missed connections, and in some cases, cancellation or abandonment, depending on policy terms.

Regarding compensation for the NATS failures, aviation experts suggest that passengers may not receive the standard compensation amounts. The NATS issues are likely to be classified as 'extraordinary circumstances,' which fall outside airlines' direct control. However, airlines must still demonstrate how the incident specifically affected a particular flight, crew, or route and what reasonable measures were taken. If a cancellation was due to a separate operational problem within the airline's control, compensation may still be payable. Disputes are anticipated regarding claims for 'knock-on disruption,' replacement travel, hotels, and meal expenses.

Scrutiny of NATS

The repeated technical failures have intensified scrutiny on NATS and its chief executive, Martin Rolfe. This marks the fourth significant system issue during Rolfe's tenure since 2015. Airlines have voiced concerns about the resilience of NATS's systems. EasyJet stated the recent issue "calls into question the resilience of NATS's systems," while British Airways described the failure as "disappointing" and warned of ongoing disruption. Jet2 called for "action, accountability and proper resilience."