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Second NATS technical failure in a fortnight grounds hundreds of UK flights

Sep 21, 2026
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Second NATS technical failure in a fortnight grounds hundreds of UK flights
Air passengers were hit with another morning of chaos on 21 September when National Air Traffic Services (NATS) suffered its second significant technical malfunction in just two weeks. The fault, traced to a flight-data processing system at the Prestwick control centre in Scotland, forced regulators to impose flow-rate restrictions across large parts of UK airspace. By mid-afternoon, analytics firm Cirium counted 227 cancellations and more than 400 delays, with Manchester, Edinburgh, Belfast International and Heathrow among the worst-affected airports. Although NATS declared the issue “fixed” within three hours, airlines warned travellers to expect knock-on disruption into the evening while aircraft and crews were repositioned. The glitch follows a 9 September systems outage that stranded an estimated 200,000 passengers worldwide and has already led to calls in Parliament for an independent review of NATS’ ageing IT estate. Business-travel groups expressed concern that two successive failures could erode confidence in the UK’s aviation infrastructure at a time when inbound corporate travel is finally rebounding to pre-pandemic levels. Industry analysts say repeated outages could prompt multinational companies to build extra buffers into travel schedules or shift last-minute meetings online—moves that would dent airline and hospitality revenues. For global mobility managers, the immediate priority is communicating alternative routings to assignees, particularly those connecting onward to Europe, the US and key Asian hubs. Travel-risk consultancies advised companies to review their duty-of-care protocols, noting that hotel rooms near northern airports sold out within hours as stranded passengers sought overnight accommodation. In the longer term, experts expect regulatory pressure to mount. The Civil Aviation Authority (CAA) has already indicated that it will scrutinise NATS’ investment plans when the next five-year price-control review begins in 2027. Meanwhile, MPs on the Transport Select Committee signalled they may reopen hearings into whether critical national-infrastructure providers should be required to hold additional back-up capacity to safeguard business continuity. Practical advice for travellers includes allowing extra connection time this week, checking airline apps for re-booking options, and keeping receipts for meals and accommodation—costs that, while not compensable under EU261 rules, may still be reimbursed as “care and assistance” if airlines fall short of their obligations.
Source: Associated Press / Euronews

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