Heathrow and Gatwick flights meltdown: Why was there such major disruption for passengers?

Read the original at Evening Standard ↗
Cite

Cecil, N. (2026, September 9). Heathrow and Gatwick flights meltdown: Why was there such major disruption for passengers? Evening Standard. https://www.standard.co.uk/news/london/flights-heathrow-gatwick-stansted-disruption-delay-cancellation-cause-b1296293.html

Dated when The Aporia collected the article, usually within hours of publication. Check the original for its exact date and byline.

Evening Standard · collected 2026-09-09 · by Nicholas Cecil

Quick Summary

A computer problem at National Air Traffic Services (NATS) has caused a major disruption for hundreds of thousands of passengers at Heathrow, Gatwick, and other UK airports, with over 700 flights cancelled or delayed. The incident is under investigation by NATS, which has acknowledged that the issue was caused by a "spurious flight plan" that sent the system into a loop, leading to a shutdown. Neal McMahon from NATS has spoken publicly about the incident, stating that it is a unique problem and emphasizing that safety remained the top priority during the resolution process. The disruption has left many passengers angry and frustrated, with some calling for improved backup systems to prevent such incidents in the future.
Written locally by qwen2.5:14b on 2026-09-09, using this article's own text rather than the other coverage of the same event (that is the story summary below).

AI analysis runs on qwen2.5:14b, locally

Story summary

Here's a summary of the news story:

Thousands of flights were cancelled and delayed at Heathrow, Gatwick, and other UK airports on Tuesday and Wednesday due to a technical issue with the National Air Traffic Services (NATS) system.

The technical failure is believed to be related to climate change, which is expected to increase turbulence and disruptions in the air travel industry. The UK's air traffic control system is under scrutiny, with many passengers left stranded for hours or even days without compensation.

Written for “UK Air Travel Chaos” on 2026-10-24, grounded in this article and the 4 other(s) covering the same event.

Story

📰 UK Air Travel Chaos
World · 5 article(s) covering the same event. Compare every outlet's account →

Compared with similar articles

This article reads unscored and hedges 6% of its claims. Each row says how that neighbour differs.
BBC News
⚖️ leaning not scored 🔴 20% hedged 20 of 99 📰 publisher trust 69
“Both articles describe a chaotic day at London's Heathrow and Gatwick airports in late June, with air traffic control issues causing hundreds of flight cancellations and delays.”
Evening Standard
⚖️ leaning not scored 🔴 6% hedged 2 of 31 📰 publisher trust 65
“Both articles describe the same technical issue affecting Nats, resulting in flight cancellations and disruptions at multiple UK airports on September 9th”
Daily Mail
⚖️ leaning not scored 🔴 9% hedged 10 of 113 📰 publisher trust 64
“Both articles describe a major technical failure at UK's air traffic control system on Tuesday, affecting multiple airports and causing hundreds of flight cancellations.”
Evening Standard
⚖️ leaning not scored 🔴 0% hedged 0 of 2 📰 publisher trust 65
“Both articles report on a computer problem at NATS, leading to hundreds of flight cancellations and delays, including those at Heathrow and Gatwick airports, on September 9th, 2026.”
Daily Mail
⚖️ leaning not scored 🔴 5% hedged 1 of 19 📰 publisher trust 64
“Article A describes a technical issue with a Boeing 787 stuck on the runway at Gatwick Airport, while Article B mentions a system issue causing flight cancellations and delays across multiple airports, without specifically mentioning an incident at Gatwick”
BBC News
⚖️ leaning not scored 🔴 0% hedged 0 of 15 📰 publisher trust 69
“The second article refers to a system issue at National Air Traffic Services, which caused flight cancellations and delays, whereas the first article specifically mentions a trackside grass fire causing disruptions.”
How this article was measured signals, leaning charts, publisher record, byline, topics and claims

Signals How these are calculated →

Claims extracted
18
sentences that state something as happening or true
Uncertain
6%
1 of 18 hedged ("reportedly", "may", "according to")
Leaning
not political
takes no side on a contested political question
Publisher signals
65/100
Evening Standard's corrections and hedging, across everything collected from it. Not a measure of accuracy.
Outlets on this story
5
World
Same framing elsewhere
1
articles that frame the event the way this one does
Analyzed 2026-09-09 · how these are computed

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Publisher

Evening Standard · 6856 article(s) · 56 correction(s) detected
Running correction rate · 56 correction(s)

Who wrote this

Nicholas Cecil
84 article(s) here · 1 carrying a prediction
🔮 Inside London's 'ghost' station where international trains could finally stop after 24 years The Standard gets exclusive tour of London’s ‘ghost’ station at heart of plan to expand international train services in capital Platforms shudder and an eery wind sweeps across the rails.
🔮 I’ve been at Waterloo since 4.30 with so much misinformation please tell me me when any train via Basingstoke ( as I’m going to Eastleigh) may actually leave thanks."
🔮 Stratford International could in future decades be used as a hub for rail services from other parts of Britain to link up with the international network so millions more people could head to the Continent by train rather than fly.
🔮 A BRRZ would mean the capital keeping more business rates raised in the city rather than the money being used to fund other regions.
🔮 Such a reform would encourage investment in growth-boosting infrastructure, it argued.
🔮 The development, backed by businesses and train drivers’ union Aslef, would mean some five million people in and around the capital getting easier access to international rail services than having to use St Pancras International in Inner London.
🔮 “That would be the best thing they can do to get growth going.
🔮 “We understand how hard this is for traders but the safety of everyone who uses the market is our priority and we will take every precaution necessary.”
🔮 The new centre is expected to create 250 permanent jobs.
🔮 “If the UK were to introduce a Wealth Tax, it would come last in the Property Tax category, making it the worst place in the OECD to own property or assets.
Also by Nicholas Cecil
Nothing else under this byline is closely related to this article, so these are simply their most recent.
All 84 articles by Nicholas Cecil →

Topics

BBC NATS The National Air Traffic Services Times Radio

Subjects

NATS ORG · 3× BBC ORG · 1× Neal McMahon PERSON · 1× The National Air Traffic Services ORG · 1× Times Radio ORG · 1×

Narrative

“My focus and that of the team has been on both getting our system operating back up normally, which it is now, but there’s obviously a huge tail to the disruption and we’ll be working on that through the course of today,” he told BBC radio on Wednesday.
framing: assertive · carried by 1 article(s) · first seen 2026-09-09
🔮 “And then our attention will turn to exactly what’s happened in this particular incident.

Claims (18 extracted, 1 hedged)

The National Air Traffic Services is urgently carrying out an investigation to identify what went so disastrously wrong, leading to hundreds of flights being cancelled at Heathrow, Gatwick, Stansted and other airports. asserted
hundreds → carry → Heathrow
“Our system issue is now resolved, we are operating normally and working as hard as possible to clear the backlog of flights.” The computer problem meant that flights were stopped from taking off from airports. asserted
flights → resolve → airports
The impact of this situation led to Heathrow and other airports running out of parking places for planes. asserted
Heathrow → lead → planes
Hundreds of flights were cancelled or delayed. asserted
Hundreds → cancel → flights
NATS did not go into detail about precisely what caused the problem. asserted
what → go → problem
In August 2023, more than 700,000 passengers experienced disruption when flights were grounded at UK airports when NATS suffered a technical glitch while processing a flight plan. asserted
NATS → experience → plan
“NATS told us it was a flight planning processing failure, which is exactly the same issue that happened in 2023,” Neal McMahon told Times Radio. asserted
McMahon → tell → Radio
“If you remember in 2023 there was an issue with a flight plan, and it sent the system in a loop that eventually caused it to shut down. asserted
it → remember → loop
“We’re told that that was a rogue flight plan and we’re told yesterday this was a spurious flight plan which caused the same outage and our question is like: these things can happen, but where’s the backup systems?” asserted
systems → tell → outage
“My focus and that of the team has been on both getting our system operating back up normally, which it is now, but there’s obviously a huge tail to the disruption and we’ll be working on that through the course of today,” he told BBC radio on Wednesday. asserted
he → get → Wednesday
“And then our attention will turn to exactly what’s happened in this particular incident. asserted
what → turn → incident
“What I will say is I don’t believe we’ve ever seen an incident happen more than once, so this will be something different that we’ve never seen in 50 years of operation.” asserted
we → say → operation
“Inevitably, things do go wrong in complex systems,” he added. asserted
he → go → systems
“We had everybody on site, everybody was in the right place. asserted
everybody → have → place
We had all the engineers in place. asserted
We → have → place
We had our various partners from software industries all on hand. asserted
We → have → hand
“So this was resolved as quickly as it could be, but within the limits of making sure that it all stayed safe.” uncertain
it → resolve → limits
His words, though, will do little to defuse the anger of many passengers caught up in the travel chaos. asserted
words → do → chaos
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