UK air traffic control failure, 8 September 2026
The disruption has ended, but the claim deadline has not. You can still file. Last checked 2026-09-13.
A NATS flight-plan system failure on 8 September 2026 cancelled more than 1,300 UK flights. Compensation is unlikely, because the cause sits outside the airlines. The duty of care is a different matter: meals, a hotel and re-routing are still owed, and most passengers never claim them.
What is now known about the cause — 13 September
The Financial Times reported that anomalous data attached to the flight plan of a British military aircraft entered the NATS Flight Processing System and triggered the failure. The aircraft has not been identified. The Ministry of Defence rejects the reading: “We do not believe there's any indication of an error on the part of the military. This is subject to the live NATS investigation.” Reported totals have also risen — around 2,000 cancellations across the episode, against the 1,300 counted in the first 24 hours.
None of this changes what you can claim, and that is the point. Whether the bad data came from a military flight plan or from NATS itself, it originated outside the airline, so Article 5(3) still answers the compensation question the same way. What it does change is the second limb: an airline saying “it was the ATC failure” a day or two later is relying on an event that was fixed on the afternoon of the 8th, and it still has to show what it did about the knock-on.
When
The failure began at about 13:46 on Tuesday 8 September 2026 and a fix was in place around 16:40. Cancellations and knock-on delays continued for roughly 48 hours afterwards as aircraft and crews ended up out of position.
What failed, and why it matters
NATS, the UK's air traffic service, reported a technical problem in the system that processes flight plans — the data telling controllers which aircraft are going where. Departures were restricted while engineers worked on it. More than 1,300 flights to and from UK airports were cancelled in the first 24 hours. Ryanair reported over 65,000 passengers affected and more than 50 flights cancelled; British Airways cancelled or diverted over 100.
Compensation is unlikely — but care is still owed
A failure inside the national air traffic service is not something an airline controls, so Article 5(3) will normally excuse it from the fixed compensation. Be sceptical of anyone promising you £520 for this one. But an extraordinary circumstance removes the compensation and nothing else. The duty of care in Article 9 and the right to re-routing or a refund in Article 8 both survive it — and there is a real exception worth testing, below.
Airports most likely to be affected
- London Heathrow (LHR)
- London Gatwick (LGW)
- London Stansted (STN)
- Manchester (MAN)
- Bristol (BRS)
- Belfast (BFS)
These were UK departures, so UK261 governs most of them, at £220, £350 or £520 where compensation is due. A flight into the UK from an EU airport falls under EU261 instead. The duty of care is worded the same way in both.
What you are owed
| What you can claim | Does it survive an extraordinary circumstance? |
|---|---|
| Compensation for the cancellation itself | Unlikely — cause outside the airline |
| Meals and refreshments while you waited | Owed, no cap |
| Hotel and transport if you were stuck overnight | Owed, no cap |
| Re-routing, or a full refund — your choice | Owed |
The point of this table is that the first row is not the whole story. Three of the four entitlements survive an extraordinary circumstance, and they are the ones passengers forget to claim.
What to do, in order
- Claim the money you actually spent. This is the part almost nobody files. If the airline did not hand out meal vouchers or book you a hotel and you paid yourself, those receipts are reimbursable under Article 9 regardless of the cause. Reasonable means reasonable — a bed and a meal, not a suite.
- Check whether you were re-routed or refunded on your terms. Article 8 gives you the choice between a seat on another flight and your money back. If you were pushed onto a flight three days later when you wanted a refund, or refunded when you wanted re-routing, say so in writing.
- If your flight was cancelled a day or two later, look harder. The further from 8 September your cancellation sits, the weaker the excuse. Under Pešková and Peška (C-315/15) an airline relying on an extraordinary circumstance must still show it took all reasonable measures to limit the knock-on. A cancellation on the 10th because crews were out of position is not automatically covered by a fault that was fixed on the afternoon of the 8th. Ask which measures it took.
- Put it in writing and keep the dates. Even where compensation is not due, a written claim for care costs is answerable and the CAA will look at a refusal. The calculator writes the letter; set it to the care and expenses you are actually out of pocket for.
Where to send it
Claim from the airline that operated the flight, not from NATS and not from the airport — your contract is with the carrier. The airline guides list each one's own claim form. If it refuses your care costs, the UK Civil Aviation Authority is the enforcement body.
The rules behind this
An air traffic control failure is outside the airline, so the fixed compensation usually falls away — but duty of care does not, and the extraordinary-circumstances guide explains the second half of the test that knock-on cancellations often fail.
Other disruptions we are tracking
- flydubai suspends all Israel flights — what passengers are owed — From 1 October 2026 — no restart date
- Charleroi airport strike — suspended after 322 cancellations — 16–23 September 2026 — suspended
- NATS Prestwick failure, 21 September 2026 — 21 September 2026
- easyJet France pilot strike — called off after a proposed deal — 1–2 October 2026 — called off
- Italian airport strikes, September 2026 — 30 September 2026
- Gatwick assisted-travel strike — called off — 17–26 September 2026
- Mexico City airport storm and the Air France cancellations — 11–13 September 2026
The full list, with dates and airports
Sources
This page reports what has been published elsewhere. It is not affiliated with any airline or authority, and the position can change — check your own flight status.