NATS System Failure Causes Thousands of Flights to be Cancelled

On Tuesday 8th September, an issue in the software of NATS, the body that manage all of the UK civil air traffic, lead to the cancellation of more than 2,000 flights within the first 48hrs of the glitch, with disruptions to flights continuing days after the incident.

What was the issue?

NATS identified an issue at one of its air traffic control centres in the early afternoon of September 8th, which meant many flights due to take off had to be grounded due to concerns over safety. NATS confirmed they had found and resolved the issue by mid-evening that same day [1], however, by this time hundred of flights from airports throughout the country, including Heathrow, Gatwick and Manchester airport, had been cancelled. Furthermore, flights from other airports including from outside the UK had to be diverted to other airports that remained unaffected by the glitch.

The impacts of the glitch have significant knock-on effects, as cancelled flights have to be rescheduled, and sometimes push out previously scheduled flights, as well as needing to move and rearrange the planes from the flights which were diverted. As such, there were days of recovery where standard operations were significantly impacted.

What are the consequences?

This disruption to UK air travellers comes less than 3 years after a similarly disruptive issue with NATS occurred in 2023. For this reason, NATS has been requested to conduct a full investigation into the issue, as well as an independent investigation by the Civil Aviation Authority (CAA)[1].

In a statement published by the CAA[2], they state that customers impacted directly by knock-on effects are “unlikely to be entitled to compensation for cancellations and delays” due to the NATS technical issue likely to be caused by “extraordinary circumstances”.

NATS not only manage civil air traffic, but they also manage and safeguard the aerodromes and the infrastructure required to maintain aviation safety, as do other aviation stakeholders. If you are planning a development near the vicinity of an aerodrome, you may be at risk of impacting aviation operations, learn how we can help on our website.  

References

[1] BBC News, “Air traffic failure was avoidable, says transport secretary”, 8 September 2026.
(Online) Available: https://www.bbc.co.uk/news/articles/c5y42v5n05do [Accessed 15 September 2026].

[2] CAA, “CAA statement on passenger compensation following NATS disruption on 8 September”, 9 September 2026.
(Online) Available: https://www.caa.co.uk/newsroom/news/caa-statement-on-passenger-compensation-following-nats-disruption-on-8-september/ [Accessed 15 September 2026].

Image  accreditation: Airport Terminal, unsplash.com, 29 May 2022. Last accessed on 15 September 2026. Available at: https://unsplash.com/photos/a-group-of-people-walking-through-an-airport-x6tdU7EwAC4