Flight chaos caused by software defect, says air traffic control body

Live updates

1. 42d ago

   NATS suffers second technical failure in two weeks

   A second air traffic control failure has disrupted flights across Scotland and northern England, causing thousands of passengers to face delays and cancellations. NATS reported a technical issue, leading Ryanair to demand the resignation of the NATS CEO. The disruption has extended to flights traveling to Mallorca, with warnings that the chaos could persist for several days. Passengers are advised to contact their airlines for current flight status updates.

   Why it matters

   A previous outage caused by a millisecond software defect in legacy systems grounded thousands of flights. This second incident follows that initial failure within a fourteen day window.

   What is confirmed

   • Air traffic control technical issues disrupted flights in Scotland and northern England.
   • Thousands of passengers faced delays and cancellations.

   Still unconfirmed

   • The Prime Minister refuses to back the air traffic control boss.

   What to watch next

   • Whether the NATS CEO resigns following Ryanair's demand
   • Official confirmation of the technical cause of the second failure
   Sources used for this update (3)

   1. www.dailymail.com — PM refuses to back air traffic control boss after second airport glitch in two weeks: Dozens of flights grounded with thousands of passengers hit by delays
   2. www.majorcadailybulletin.com — Mallorca flights disrupted by another air traffic control issue in the UK: chaos could last days
   3. aerospaceglobalnews.com — UK flights disrupted as NATS suffers another major technical failure
   confidence 80%
2. 45d ago

   Software defect caused UK air traffic outage

   A software error lasting a millisecond caused a major air traffic outage in the UK, grounding thousands of flights and affecting hundreds of thousands of passengers. An air traffic control body and a subsequent review identified the cause as a software defect, with the Financial Times reporting the bug was linked to legacy software. The glitch led to widespread flight cancellations across the region.

   Why it matters

   Air traffic control systems manage the safe separation of aircraft in congested airspace. A failure in these systems forces controllers to halt flights to prevent collisions. This event highlights vulnerabilities in the aging digital infrastructure used for national aviation safety.

   What is confirmed

   • A software error lasting a millisecond caused an air traffic outage.
   • The outage grounded thousands of flights.
   • Hundreds of thousands of people experienced flight chaos.
   • A UK air traffic control body attributed the cancellations to a software glitch.

   Still unconfirmed

   • The software bug was caused by legacy software.

   What to watch next

   • Details on the specific legacy software version involved
   • Official timeline of the system recovery process
   • Regulatory decisions regarding software updates for air traffic control
   Sources used for this update (6)

   1. BBC — Flight chaos caused by software defect, says air traffic control body
   2. The Guardian — Flight chaos for hundreds of thousands was caused in ‘millisecond’ by software error
   3. Sky News — 'Millisecond' software error caused air traffic outage that grounded thousands of flights
   4. AP News — UK air traffic controller blames a millisecond-software glitch for flight cancellations
   5. Financial Times — UK air traffic outage caused by ‘legacy’ software bug, says review
   6. www.yahoo.com — LA Metro bus crash: Arraignment postponed for suspect
   confidence 95%