Travelers across the United Kingdom and Ireland faced widespread flight delays on Tuesday following a technical failure at the national air traffic control provider, Nats. Major aviation hubs, including London Heathrow, Gatwick, Stansted, and Manchester, reported disruptions to departing flights as engineers scrambled to fix the software glitch.

The trouble began around midday when air traffic authorities temporarily halted outbound departures at Heathrow, the busiest airport in the country. Although flights eventually resumed, operations remained stop-start throughout the afternoon as controllers managed a growing backlog of grounded planes. Incoming aircraft continued to land safely according to schedule, though arrivals experienced minor adjustments to accommodate the flow.

Nats confirmed that the incident stemmed from an unexpected fault within its primary flight data processing system. Technical teams were immediately dispatched to address the problem directly on site. Representatives for the agency stated that while the national airspace remained open and aircraft continued to leave the ground, the normalization of schedules would take considerable time.

Airports outside the British capital also registered significant impacts. Manchester Airport warned passengers to anticipate rolling delays for outbound services, while East Midlands and Edinburgh airports alerted travelers through social media that schedules could shift with little warning. Across the Irish Sea, both Dublin and Cork airports experienced knock-on delays tied to the unfolding situation in British airspace.

Airlines urged customers to remain patient and monitor their travel status before heading to terminals. British Airways issued an advisory instructing ticket holders to arrive for their flights as scheduled unless notified otherwise, emphasizing that the disruption was completely outside carrier control. Ryanair similarly stated that impacted customers would receive direct notifications regarding schedule adjustments.

The air traffic management body issued an apology for the inconvenience inflicted on the traveling public. Officials noted that regular updates regarding the system recovery would be published through official digital channels and social media. Passengers awaiting departures have been strongly advised to verify their flight statuses directly with their respective airlines before leaving for the airport.

Reporting based on coverage first published by BBC News. Read the original report at BBC News.