Flight delays and cancellations are expected this weekend following the global IT outage – as experts warned it could take weeks for systems to fully recover.
The outage spread globally on Friday morning after an update from global cybersecurity firm CrowdStrike knocked many Microsoft Windows PCs offline with a “blue screen of death” appearing on screens.
The issue caused travel cancellations and left NHS systems inaccessible.
The company’s founder later confirmed it was caused by a bug in the update and not a cyber attack, as some had feared.
Follow live: Major services affected by global outage
George Kurtz said while a fix had been rolled out, it would be “some time” before all systems are returned to normal and an industry expert warned it could take “weeks” for a full recovery.
Delays into the weekend
Adam Leon Smith of BCS, the Chartered Institute for IT, said: “The fix will have to be applied to many computers around the world.
“So if computers are getting blue screens and endless loops, it could be more difficult and take days and weeks.”
As the outage became apparent early on Friday, airlines around the globe warned delays were ahead – and cancellations soon hit too, on what should have been the busiest day of the year so far for UK air travel.
Read more:
What we know so far
Services affected by the outage
Passengers at Stansted Airport waited outside the terminal on the UK’s hottest day of the year so far. Pic: PA
Passengers queue by the Ryanair check-in desk at Stansted. Pic: PA
By 8pm, 5,078 flights had been grounded worldwide – which equates to 4.6% of all scheduled flights globally, according to an aviation analytics company.
Cirium Data added that 167 flights that should have left UK airports have been cancelled so far – which is 5.4% of departures – while 171 inbound arrivals were cancelled.
Airports across the UK – including London Gatwick, Heathrow Airport, Manchester Airport and Belfast International Airport – are now stressing that passengers should check with airlines for any delays or cancellations before travelling over the weekend.
“Some delays and cancellations will continue this evening and over the weekend,” said a spokesperson for London Gatwick. “We strongly advise passengers to check with their airline for the latest updates.”
“Some flights could be cancelled by airlines at short notice,” said a spokesperson for Manchester Airport.
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How were health services impacted?
The NHS was hit by the outage as “the majority of GP practices” in England and two thirds of those in Northern Ireland were impacted, while South Western Railway said its ticket vending machines had failed.
Customers also reported issues with supermarket payments, online banking and communications systems including Microsoft Teams.
The National Pharmacy Association also warned disruption to pharmacy services is likely to continue through the weekend, even when systems are back online, as outlets deal with a backlog of medicine deliveries.
What has CrowdStrike said?
Speaking on NBC’s Today Show on Friday, CrowdStrike chief Mr Kurtz said: “We’re deeply sorry for the impact that we’ve caused to customers, to travellers, to anyone affected by this.”
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IT outages: CrowdStrike CEO apologises
“Many of our customers are rebooting the system and it’s coming up and operational because we fixed it on our end,” he continued.
“Some of the systems that aren’t recovering, we’re working with them, so it could be some time for some systems that just automatically won’t recover, but it is our mission to make sure that every customer is fully recovered.”
In a letter to customers and partners, Mr Kurtz also warned “bad actors” may take advantage of the situation and people should be on the lookout for scams.
“I encourage everyone to remain vigilant and ensure that you’re engaging with official CrowdStrike representatives,” he said.