More than 2,000 flights were canceled across 15 airports in the United Kingdom on September 12, 2026, with delays spilling into September 13 as airlines and airports struggled to manage the backlog. The disruptions affected major hubs including Heathrow Airport in London and Gatwick Airport south of the city. Passengers remained stranded on runways and inside terminals for hours amid ongoing delays.
Cause Identified as Flight Processing System Issue at NATS
The technical failure originated in a flight processing system operated by NATS, the UK’s air traffic control provider. NATS resolved the core system problem by the afternoon of September 12, but residual delays and backlogs continued through the
following day. NATS is a public-private partnership, with the UK government holding 49% ownership and airlines, airports, investors, and employees holding the remainder.
Passengers Face Prolonged Delays and Customer Service Failures
Passengers faced extended wait times on runways and in terminals across affected airports. Some airlines struggled to handle rebookings and reposition aircraft amid the disruption. British Airways, in particular, reportedly switched off their customer service phone line due to overwhelming call volumes. One passenger, Charlie Adlard, described losing a day of work and incurring extra hotel and meal costs due to the cancellations.
Official Response Includes Apologies and Government Investigation Deadline
Martin Rolfe, head of NATS, apologized for the widespread disruption, stressing that the UK’s
air traffic control system remains among the safest globally. Rolfe emphasized the priority on safety and the need to take decisive action when issues cannot be quickly resolved. U.K. Transport Secretary Heidi Alexander met with Rolfe on September 13 and demanded a full investigation of the incident within one week. Prime Minister Andy Burnham’s office confirmed its continued confidence in him.
Airlines and Airports Combat Operational Challenges
Heathrow Airport urged travelers to verify their flight status before heading to the airport, advising only those with confirmed flights to travel. Heathrow also announced deploying additional staff to support passengers during the recovery. Airlines faced significant difficulties rebooking
passengers and managing aircraft placements disrupted by cancellations across the network.
Second Major UK Air Traffic Control Failure in Three Years
This incident marks the second major air traffic control failure in the UK within three years. Industry voices have called for accountability from NATS leadership amid repeated system breakdowns. The government’s 49% stake in NATS gives it veto power over key decisions, leaving regulatory scrutiny heightened as investigations proceed.
