Heathrow Ground Stop Adds Fresh Travel Misery as NATS Fault Hits UK Airports

Passengers across Britain faced widespread flight disruption on Tuesday after a NATS technical fault hit the UK air traffic control network. Heathrow briefly halted departures, and delays soon spread to major airports nationwide.

NATS traced the fault to its flight processing system. Engineers later applied a fix, but NATS warned that recovery would take time.

Heathrow Departure Halt Spreads Across UK Airports

Heathrow first reported problems with departing flights. The airport later warned that the NATS fault was disrupting services across the UK network. Flight-tracking data showed about 100 Heathrow cancellations and 367 delays by Tuesday evening. Gatwick also faced heavy disruption, with roughly 31% of scheduled flights delayed.

Manchester and Stansted reported delays as airlines adjusted schedules. Luton, Birmingham, Aberdeen and Glasgow also saw disruption. Edinburgh warned passengers about possible delays. Dublin Airport also reported disruption on services linked to the UK.

NATS kept UK airspace open throughout the fault, but traffic restrictions cut departure capacity. The limits created a growing backlog across several airports.

Airlines Face Knock-on Delays Across Europe

British Airways cancelled several short-haul services as delays mounted. The airline prioritised long-haul departures while restrictions remained in place. EasyJet suffered heavier disruption. Flightradar24 counted 218 easyJet cancellations by 17:00 UTC, making it the most affected airline in the tally.

Some UK-bound aircraft remained overseas while restrictions continued. Other flights diverted to airports in continental Europe as airlines managed the disruption.

Ryanair said the fault delayed more than 65,000 passengers by up to eight hours. The airline also reported more than 50 cancellations.

The disruption left aircraft and crews out of position, extending problems after NATS started restoring its system. Airlines then had to rebuild schedules around delayed aircraft and missed departure slots.

Heathrow told passengers to check directly with their airline. It also advised travellers to reach the airport only after their carrier confirmed the flight.

NATS Restores System but Backlog Continues

NATS first reported the technical issue at 13:46 on 8 September. At 15:25, it said the fault affected its flight processing system. At 16:40, NATS said engineers had implemented a fix. The company said its flight system had started to recover.

The fix did not clear the disruption immediately. Airlines still faced delayed aircraft, missed slots and displaced crews. Flightradar24 counted 625 cancellations to and from UK airports by 17:00 UTC. EasyJet accounted for 218, while British Airways recorded 132 in the same tally.

NATS had not published a detailed root cause by the latest update. The company had only identified the affected flight processing system. The latest fault renewed scrutiny of NATS after its major August 2023 outage. That failure disrupted more than 700,000 passengers and prompted an independent review.

The review issued 34 recommendations for NATS, airlines, airports, regulators and government. The Civil Aviation Authority has continued tracking progress on those measures.

Passenger Rights Still Apply During Disruption

UK261 rules require airlines to care for passengers during qualifying delays. Airlines may need to provide food, drink, hotel accommodation and transport. Passengers on cancelled flights can choose a refund or alternative transport. They should keep receipts if they pay reasonable disruption costs themselves.

Fixed compensation follows different rules. The Civil Aviation Authority says airlines may reject claims caused by extraordinary circumstances. Air traffic control problems can fall within that category. However, passengers still keep their rights to care and alternative transport when UK261 applies.

Travellers should check their flight status before leaving for the airport. Airlines warned that disruption could continue while schedules recovered.