UK flights delayed and cancelled after NATS technical fault

The United Kingdom’s air traffic control provider, NATS, is facing heightened scrutiny after a technical fault on Wednesday morning caused widespread disruption to the national air‑traffic network. The malfunction, traced to a failure in a central routing system, forced controllers to revert to manual procedures, leading to the cancellation of more than 200 flights and delays affecting upwards of 1,500 passengers across major airports including Heathrow, Gatwick and Manchester. The outage, which lasted for approximately three hours, prompted the Civil Aviation Authority to issue an emergency advisory and to coordinate with airlines on contingency measures.

NATS has launched an internal investigation and is cooperating with the CAA and the Department for Transport to determine the root cause and to implement corrective actions. Preliminary statements indicate that the fault originated from a software glitch that was not detected during routine system checks. The provider has pledged to review its maintenance protocols and to accelerate upgrades to its digital infrastructure to prevent recurrence. As the investigation proceeds, regulators and industry stakeholders are monitoring the response to ensure that the integrity and resilience of the UK’s air‑traffic management system are restored and maintained.