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UK air traffic chaos caused by 'millisecond' software defect, NATS says

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Neutral summary

A preliminary report by National Air Traffic Services (NATS) has found that a software defect that occurred “in the space of a millisecond” caused the disruption that led to more than 2,000 flight cancellations across UK airports on September 8. The fault affected hundreds of thousands of passengers. NATS said the incident was not caused by any incorrect actions by military or civil operators, nor was it linked to a 2023 outage. UK ministers said the report leaves questions unanswered about why the issue was not discovered and fixed earlier.

How it was framed

Outlets: 20. Countries: 8. Facts in the shared core: 7.

Publication timeline

  1. · The Mirror (outlet profile)

    Australia airport outage: Sydney, Melbourne and Brisbane all hit by delays after 'technical issue'. Travellers have been thanked for their patience after the outage which affected passengers at Sydney, Melbourne and Bri…

  2. · The Hindu (outlet profile)

    Passengers protest in Thiruvananthapuram airport following cancellation of Air India Express flight to Sharjah. Passengers, who arrived at the airport on Friday morning, protested, alleging that the flight was cancelled…

  3. · Sky News (outlet profile)

    'Millisecond' software error caused air traffic outage that grounded thousands of flights. The air traffic outage that grounded thousands of flights was not caused by a 'military operation' but by a software problem tha…

  4. · Daily Mail (outlet profile)

    Airports chaos caused by 'software glitch' officials find - as Government orders further probe but dodges sacking under-fire NATS boss. The National Air Traffic Services (NATS) probe into the incident on September 8 sai…

  5. · The Independent (outlet profile)

    Cause of last week’s UK air travel chaos revealed by new report. Nats has revealed that the air traffic control system issue that resulted in disruption to more than 2,000 flights last week was caused by a ‘software def…

  6. · Belfast Telegraph (outlet profile)

    Flight ‘chaos’ this month caused by ‘software defect’ – report

  7. · Evening Standard (outlet profile)

    Flight ‘chaos’ this month caused by ‘software defect’ – report. The fault caused flights both in and out of the UK to be axed, impacting hundreds of thousands of passengers.

  8. · The Independent (outlet profile)

    Software defect to blame for disrupting more than 2,000 flights

  9. · The Guardian (outlet profile)

    Flight chaos affecting hundreds of thousands was caused in ‘millisecond’ by software error. UK ministers say report into incident leaves questions unanswered over why problem was not discovered and fixed earlier A softw…

  10. · The Mirror (outlet profile)

    'Defect' behind last week's UK air travel chaos emerges in report after 2,000 flights grounded. NATS chief executive Martin Rolfe said he could confirm the issue was not caused by 'any incorrect actions by either milita…

  11. · GB News (outlet profile)

    ‘Millisecond’ software error caused flight chaos for hundreds of thousands of Britons. An investigation has found that a fault in the software responsible for assigning identification codes to aircraft was behind an air…

  12. · Channel NewsAsia (outlet profile)

    'Software issue' caused UK flight chaos this month: Operator. More than 2,000 flights were cancelled across major UK airports last week, affected hundreds of thousands of passengers. 

  13. · Belfast Telegraph (outlet profile)

    Flight disruption ‘not caused by any incorrect actions’ – report

  14. · Evening Standard (outlet profile)

    Flight disruption ‘not caused by any incorrect actions’ – report. A preliminary report into the incident on September 8 was published by the National Air Traffic Services on Friday.

  15. · Nova.rs (outlet profile)

    Jedna milisekunda bila dovoljna za potpuni haos: Otkazano više od 2.000 letova, sada je otkriven uzrok. Softverska greška koja se dogodila „u prostoru od jedne milisekunde“ izazvala je veliki kolaps britanske kontrole l…

  16. · ТАСС (outlet profile)

    В Британии исключили "военное вмешательство" из причин сбоя в работе аэропортов. В NATS причиной назвали программный сбой в одном из компонентов Национальной системы управления воздушным пространством

  17. · Коммерсантъ (outlet profile)

    К отмене 2 тыс. авиарейсов в Великобритании привела программная ошибка. Масштабный сбой в работе британских аэропортов, случившийся 8–9 сентября, был вызван редкой программной ошибкой, а не военным самолетом, передавшим…

  18. · South China Morning Post (outlet profile)

    Over 2,000 UK flight cancellations traced to millisecond software defect. A preliminary report on Friday blamed a millisecond-software defect for the cancellation of over 2,000 flights in and out of the United Kingdom l…

  19. · Ouest-France (outlet profile)

    Au Royaume-Uni, un « défaut logiciel » à l’origine de plus de 2 000 vols annulés dans les aéroports britanniques. Plus de 330 000 passagers ont été affectés la semaine dernière par d’importantes perturbations dans les a…

  20. · Valor Economico (outlet profile)

    Falha no controle de tráfego aéreo do Reino Unido foi causada por defeito de software, afirma operadora. A NATS, empresa responsável pelo controle de tráfego aéreo britânico, informou nesta sexta-feira (18) que uma inte…

  21. · TechRadar (outlet profile)

    2,000 UK flight cancellations caused by ‘previously unknown defect’ that happened in the ‘space of a millisecond’ — travel chaos took days to fix and left hundreds of thousands stranded. A report from Nats found that th…

  22. · Интерфакс (outlet profile)

    Ошибку ПО назвали причиной сбоя в британских аэропортах 8 сентября. Национальная служба управления воздушным движением Великобритании (NATS) в пятницу заявила, что сбой в работе аэропортов ранее в сентябре произошел из-…

  23. · Channel 4 News (outlet profile)

    Report says software error to blame for travel chaos that grounded thousands of flights www.channel4.com/news/report-...

  24. · Insajder (outlet profile)

    Softverska greška u „deliću sekunde“ izazvala prekid avio saobraćaja u Velikoj Britaniji. Softverska greška koja se dogodila u deliću sekunde izazvala je prekid u vazdušnom saobraćaju zbog kojeg su prizemljene hiljade l…

Factual core

  • National Air Traffic Services (NATS) reported that the software defect caused the incident.
  • The disruption affected more than 2,000 flights in the UK last week.
  • A software defect caused over 2,000 flight cancellations at British airports.
  • The software defect corrupted flight data in the space of a millisecond.
  • The flight disruption impacted hundreds of thousands of passengers.
  • Nats chief executive Martin Rolfe confirmed the disruption was not connected to a Nats outage in 2023 or a radar problem in July last year.
  • Nats, the UK air traffic control provider, revealed the cause of the disruption.

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