UK air traffic control failure disrupts 65,000+ passengers across Europe

On Tuesday afternoon, the British aviation system seized up. A technical glitch in Nats' flight processing system—the company that manages air traffic control for 15 UK airports—sent shockwaves across Europe, grounding hundreds of flights and trapping tens of thousands of passengers in terminals and on tarmacs. By 5pm, more than 425 flights had been cancelled. Heathrow, Gatwick, Manchester, Birmingham, Edinburgh, and Stansted all reported cascading disruptions. Dublin Airport, though not directly under Nats' control, felt the ripple: 43 departures and 30 arrivals cancelled as European airspace became congested with diverted traffic.

Ryanair bore the heaviest blow. The budget carrier reported that more than 65,000 of its passengers were disrupted across its network, with more than 50 scheduled flights scrapped entirely. British Airways cancelled or diverted over 100 flights, affecting tens of thousands of customers. EasyJet reported flights unable to operate. The disruption was not confined to the UK—it radiated outward, affecting airports and passengers across the continent. Nats announced around 7:30pm that the system issue had been resolved and that recovery operations were underway, but the damage was already done.

For those caught in the chaos, the afternoon became a blur of uncertainty and frustration. Katherina Wilken, 26, was supposed to fly from Heathrow to Düsseldorf at 2:45pm. At 3pm, with no gate information and no clear answers, she began to panic. She and her partner ended up rebooked for a 7am departure the following morning. Rather than navigate to a distant hotel, they decided to spend the night at the airport. Journalist Julia Pobegailova boarded a Wizz Air flight from Gatwick bound for Tel Aviv around 1:30pm, only to sit motionless on the runway for three hours before being told the flight was cancelled. The airline's next service to Tel Aviv wasn't until Saturday—four days away. She told reporters she was trying not to panic, trying to find a solution.

Josie Donoghue, a healthcare worker, boarded a Ryanair flight to Shannon at around 3pm. Everything seemed normal until the crew announced a delay due to air traffic control issues. After three hours on the runway, passengers were told the flight was cancelled. Donoghue described the experience of trying to exit the airport as "like trying to get out of Alcatraz." Chi Chen, 43, made it all the way through security at Heathrow for a 6:15pm flight to Naples, only to learn at 3:30pm that his flight had been cancelled. He and a friend had planned ten days in Capri and Tuscany. British Airways offered him an alternative on Thursday morning via Brussels—a routing he couldn't accept.

Transport Secretary Heidi Alexander said she was seeking assurances that lessons would be learned and that systems supporting aviation were adequate to the task. Nats apologised for the disruption and urged passengers to check with their airlines for updates. A British Airways spokesperson acknowledged that despite Nats' announcement of recovery, the severity of the outage meant significant knock-on effects would persist for customers and staff. The company called the incident "entirely out of our control and incredibly frustrating."

This was not the first time. In July 2025, a radar-related issue at Nats' control centre in Swanwick, Hampshire, had grounded flights across the UK, cancelling more than 160 flights and disrupting thousands. In August 2023, a technical glitch while processing a flight plan had affected over 700,000 passengers. Three major failures in 13 months raised an uncomfortable question: whether the infrastructure underpinning British aviation could reliably handle the volume and complexity of modern flight operations. As evening fell on Tuesday, passengers were still trying to piece together alternative routes home, and the backlog of cancelled flights stretched into Wednesday and beyond.