NATS System Failure Forces Thousands of Cancellations as Operations Resume

Overview

• A technical fault in NATS's flight‑processing system triggered large‑scale regulation of arrivals and departures that struck on Tuesday and led to roughly 1,000–2,000 cancelled flights and many more delays across Heathrow, Gatwick, Manchester, Stansted and other airports.
• NATS engineers restored core services by the early hours of Wednesday, but airlines and airports warned that aircraft and crews were out of position so knock‑on cancellations and delays continued while schedules were rebalanced.
• Ryanair said about 150,000 of its passengers were affected, canceling 260 flights and reporting an immediate loss of about £2.5–3 million, while other carriers including British Airways and easyJet also recorded mass disruptions.
• Transport Minister Heidi Alexander summoned NATS chief executive Martin Rolfe for answers, ministers ordered an independent review of contingency plans, and industry executives publicly pressed for leadership accountability.
• The incident compounds a pattern of past failures — including a 2023 collapse and a 2025 radar fault — and raises practical concerns about backup procedures, how flight plans are processed, and the wider cost to travellers and airlines as recovery continues.