Flights using U.K. airspace were delayed or canceled for several hours on Monday due to what Britain’s National Air Traffic Service said was a technical issue that it had now identified and remedied.
NATS had earlier had to restrict the flow of aircraft and manually input flight plans after the issue affected its system’s ability to automatically process flight plans, with airlines and airports warning of delays and cancellations.
“We have identified and remedied the technical issue affecting our flight planning system this morning. We are now working closely with airlines and airports to manage the flights affected as efficiently as possible,” NATs said in a statement.
“Our engineers will be carefully monitoring the system’s performance as we return to normal operations.”
Earlier Irish air traffic control provider AirNav Ireland said the issue, which struck during a public holiday in parts of Britain, was resulting in “significant delays for flights across Europe that are traveling to, from or through U.K. airspace.”
A spokesperson for London Heathrow, the busiest hub in western Europe, said the airport was working with NATS and other airport partners to minimize the impact on passengers, while Gatwick, south of London, said it was seeing multiple delays and cancellations.
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A WestJet spokesperson told Global News that the Calgary-based airline had been affected by the outages overseas.
Three Calgary-bound flights from Gatwick, Heathrow and France’s Charles de Gaulle airport had been delayed anywhere from a few minutes to just over an hour before departing on Monday, the spokesperson said in an email.
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One flight from Edinburgh was delayed for at least three hours and 45 minutes and still had not departed for Calgary as of 1 p.m. ET, according to WestJet.
“While the majority of our flights operating from Europe have departed, we sincerely appreciate our guests’ patience and understanding as we provide them with updates as they become available,” the spokesperson said.
There were nearly 50 flights between Canada and the U.K. scheduled for Monday according to data provided to Global News from Cirium, an aviation analytics company. Those flights account for roughly 13,500 seats sold for travellers between the countries.
As of 11 a.m. ET, there were no reported cancellations for Canada-U.K. flights, according to Cirium.
Earlier Scottish airline Loganair said there had been a network-wide failure of U.K. air traffic control computer systems.
British Airways said it its flights were being severely disrupted and it had made “significant changes” to its schedule, while other airlines including Ryanair also said some flights to and from the UK would be delayed or canceled.
Manchester Airport and London Stansted were among the many U.K. airports who warned of potential disruption to flights, while Dublin Airport said the issues were resulting in delays and cancellations to some flights into and out of the Irish capital.
Many passengers took to social media to say they were stuck on planes on the tarmac waiting to take off, or being held in airport buildings, in Spain, Portugal, Greece, Israel and elsewhere on what is a traditionally busy travel day as the school holidays draw to a close.
One Reuters witness who was held on the tarmac at Budapest for two hours before being taken off the plane said their pilot told passengers that they could face an eight-12 hour delay.
— Reporting by Kylie MacLellan, additional reporting by Mitch Phillips; Editing by Louise Heavens, Jason Neely and Alison Williams. With files from Global News reporter Craig Lord.
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