The ‘most serious IT outage the world has ever seen’ sparked global chaos today – with planes and trains halted, the NHS disrupted, shops closed, football teams unable to sell tickets and banks and TV channels knocked offline.
Officials have held an emergency COBRA meeting after a devastating technical fault caused Microsoft’s Windows computers to suddenly shut down, prompting departure boards to immediately turn off at airports including Heathrow, Gatwick and Edinburgh on the busiest day for British airports since Covid.
NHS England said patients should not to attend GP appointments unless informed otherwise due to problems with the system used to schedule appointments, while train passengers have been told to expect delays due to ‘widespread IT issues across the entire network’.
With more than a thousand flights cancelled globally, passengers were seen sleeping in passageways at Los Angeles International Airport, huge queues formed at terminals across Spain, and in Delhi staff set up a makeshift whiteboard to record departures.
Shops in Australia shut down or went cashless after digital checkouts stopped working, while in the US emergency services lines went down in Alaska, Arizona, Indiana, Minnesota, New Hampshire and Ohio.
Cyber security company CrowdStrike has admitted to being responsible for the error that hit Microsoft 365 apps and operating systems and said a ‘fix has been deployed’. The American firm said it was caused by a ‘defect found in a single content update’ and insisted the issue ‘was not a security incident or cyberattack’.
Windows is the most used operating system in the world, meaning the outage is affecting almost every part of the global economy – with supermarkets and cafes, including Morrisons, Waitrose, B&Q and the bakery chain Gail’s, unable to take card payments.
Technology experts have said the disruption is at the scale expected from Y2K or the ‘Millennium Bug’, a computer programming shortcut that was forecast to cause chaos as the year changed from 1999 to 2000 but never materialised.
‘I don’t think it’s too early to call it: this will be the largest IT outage in history,’ said Troy Hunt, a prominent security consultant, in a social media post. ‘This is basically what we were all worried about with Y2K, except it’s actually happened this time.’
TV channels including Sky News and CBBC spent time off air this morning, and football clubs including Manchester United and Blackburn Rovers have told fans they will have to delay the release of match tickets. Schoolcomms – an app that parent communication app that is used by thousands of schools – is also reporting ‘issues’.
As engineers battle to restore services –
EDINBURGH: Huge queues form outside Edinburgh Airport departures amid the chaos caused by the Microsoft outage
VICTORIA: The mainline station in London warned of ‘widespread IT issues across the entire network’
NETHERLANDS: Passengers look at signs displaying departure information at Schiphol Airport in Amsterdam
Passengers wait at check-in for a flight operated by Indian carrier IndiGo at Dubai Airport in the United Arab Emirates
SPAIN: Passengers wait at Barajas Airport following the outage – which comes on an extremely busy day for global aviation
LAX: Travellers at Los Angeles International Airport had to sleep in a passageway after flights were cancelled
AUSTRALIA: The ‘blue screen of death’ is seen at a supermarket in Brisbane after the outage
The Cobra system that deals with matters of national emergency or major disruption has been fired up to manage the UK Government’s response, Chancellor of the Duchy of Lancaster Pat McFadden said.
Ministers are in touch with their sectors to tackle the fallout from the IT failures, with Transport Secretary Louise Haigh saying she is working ‘at pace with industry’ after trains and flights ground to a halt.
Mr McFadden, who is in charge of the Whitehall machine, said: ‘Many people are being affected by today’s IT outages impacting services across the country and globally.
‘Ministers are working with their sectors and respective industries on the issue. I am in close contact with teams co-ordinating our response through the COBR response system.’
An emergency Cobra meeting was held at official-level – rather than ministers – on Friday morning to discuss the IT chaos, Downing Street said.
A No 10 spokeswoman told reporters: ‘We recognise the impact this is having on services and the Government is working closely with the respective sectors and industries on this issue, which is affecting services not only across the UK but also globally.
‘Officials have met in the Cobra unit on this this morning and of course are updating ministers regularly on this issue.’
She said she was not aware of plans for a Cobra gathering with ministers present.
Asked why Sir Keir Starmer did not chair the meeting of the committee, she said: ‘The Prime Minister’s had bilaterals with President Zelensky and Cabinet this morning, but all ministers including the Prime Minister are being kept informed with the latest.’
The spokeswoman also said she is not aware of any Government business being hit by the outage.
GPs have also been hit, with surgeries in Cumbria, Cheshire, Yorkshire and the West Midlands taking to social media to say their systems had been affected.
The issue has hit the EMIS system, which allows doctors to book appointments, view patient notes, order prescriptions and make referrals.
Speaking to MailOnline, a practice manager of a GP practice in Berkshire said: ‘We are completely dead in the water.
‘We can’t see any patients are systems are down. It’s not clinically safe to treat patients because we can’t see their notes.
‘Can’t give out prescriptions and even if we do hand write them the problem is also affecting the pharmacies. It’s affecting the whole area and hospitals are in an even worse situation.’
Hospitals have also been affected, with Salisbury District Hospital saying it was experiencing delays.
Professor Kamila Hawthorne, chairwoman of the Royal College of GPs, said any form of IT outage ‘is a serious concern’ and urged patients to ‘bear with’ GPs until the issue is resolved.
The LSE Group, which operates the London stock exchange, said it was experiencing a global technical issue preventing news from being published.
Bristol Water said it is experiencing company wide IT issues but the billing department remains operating.
The Port of Dover saw longer queues this morning, but said it is now operating as normal.
Microsoft 365 say they are investigating an issue impacting users’ ability to access apps and services.
‘Our services are still seeing continuous improvements while we continue to take mitigation actions,’ they said on X this morning.
‘We still expect that users will continue to see gradual relief as we continue to mitigate the issue.’
Research firm Cirium found today was set to be the busiest day for UK flight departures since October 2019 – before Covid – with more than 3,214 planned.
Among the impacted firms are Ryanair, with the airline posting to its website: ‘Potential disruptions across the network (Fri 19 July) due to a global third party system outage.
‘Affected passengers will be notified and any passengers travelling across the network on Fri 19 July should check their Ryanair app for the latest updates on their flight.
‘We advise passengers to arrive at the airport three hours in advance of their flight to avoid any disruptions.
‘We regret any inconvenience caused to passengers by this third party IT issue, which is outside of Ryanair’s control and affects all airlines operating across the network.’
Edinburgh Airport said the IT outage is causing longer waiting times.
Stansted Airport said that some airline check-in services are being done manually as a result of the IT outage, but ‘flights are still operating as normal’.
Meanwhile, Govia Thameslink Railway (GTR) – parent company of Southern, Thameslink, Gatwick Express and Great Northern – warned passengers to expect delays because of the issue.
Later this morning, industry body the Rail Delivery Group said ‘most trains are still running across the country’ and told passengers to check National Rail Enquiries website for the latest updates.
Train passengers can expect disruption today due to the outage (pictured is a Great Northern train reading ‘not in service’)
NHS England told patients not to attend GP appointments unless told otherwise due to problems with the appointment and patient record system
The outage is also affecting some NHS systems, including those used by GP surgeries
Sky News went off air following the technical issue with the Microsoft operating system
The channel is now back on air, but without some of its usual on-screen graphics. Travel expert Simon Calder told the channel today is the busiest day for British airports since Covid
Microsoft users around the world have taken to social media to express their confusion at their computers shutting down
Windows is the most used operating system in the world, meaning the outage is affecting almost every part of the global economy – with restaurants and cafes, including the bakery chain Gail’s, unable to take card payments
A checkout worker in a Little Waitrose at Kings Cross Station told customers: ‘It is cash only at the moment. The card machines are not working’
Even football clubs have been affected, with Manchester United and Blackburn Rovers telling fans that its ticketing platform was malfunctioning
A Great Northern train at Hunt’s Cross station in Liverpool today. The operator is among those experiencing problems
Huge queues at Gatwick Airport after a massive Microsoft outage affected services
Holidaymakers at Gatwick Airport have been left stranded and unable to check-in following the Microsoft outage
This passenger at Gatwick complained of waiting for an hour with ‘no update given’
The firm posted on social media: ‘We are currently experiencing widespread IT issues across our entire network. Our IT teams are actively investigating to determine the root cause of the problem.
‘We are unable to access driver diagrams at certain locations, leading to potential short-notice cancellations, particularly on the Thameslink and Great Northern networks.
‘Additionally, other key systems, including our real-time customer information platforms, are also affected. We will provide additional updates when we can. In the meantime, please regularly check your journey before you travel.’
South Western Railway said all its ticket vending machines had stopped working due to IT issues.
It advised passengers to ‘purchase your ticket online, on the train or speak to a member of station staff’.
A checkout worker in a Little Waitrose at Kings Cross Station told customers: ‘It is cash only at the moment. The card machines are not working.’
A queue of thirty people was seen snaking around the supermarket.
One shopper said: ‘There is a massive IT issue and all the self checkouts are not working. It is cash only.’
The major disruption could prompt a rethink on whether the most resilient operating systems are being used and whether it is ‘lazy’ to stick with what we know, according to cybersecurity expert Dr Harjinder Lallie.
The associate professor at the University of Warwick described the situation as an IT ‘catastrophe’.
He said: ‘The worldwide IT outage experienced this morning is unprecedented in the range and scale of systems it has impacted.’
He added: ‘This IT ‘catastrophe’ highlights the need for greater resilience, a greater focus on back-up systems, and possibly even a need to rethink whether we are using the most resilient operating systems for such critical systems.’
Dr Lallie said: ‘We have here a particular combination of tools – an operating system and a tool at the other end and once you put those combinations together you suddenly find that it’s impacting a lot of systems. There is an over-reliance on a) Microsoft b) in this case CrowdStrike at the other end.
‘Somewhere between the two there’s been a problem which has caused what is an absolutely unprecedented global outage.
‘I’ve never seen anything like this before. We had the NHS, WannaCry (ransomware attack), that was serious. But this is planes, TV stations, it’s such a massive impact.’
He said the issue has demonstrated how exposed companies and services can be.
He said: ‘We didn’t know how exposed we were until this happened. Now it’s happened we’re tracing it back and realising ‘crikey, how much reliance we have on these two systems’.’
He suggested there could be more diversity in use of different operating systems.
He said: ‘Windows is brilliant, Microsoft is brilliant but there are other operating systems that we could be using in certain mission-critical systems and companies need to think very carefully about, in this particular scenario, is Microsoft the best option or should we actually take the plunge and go with another operating system?
‘I don’t know if those conversations are being had or if we are, excuse the term, being lazy and just sticking with Microsoft because we know Microsoft really well.’
Asked why this might be, he said the ‘massive’ cost of training staff on new systems could be a consideration.
Professor Ciaran Martin, who was the founding chief executive of the National Cyber Security Centre (NCSC), said early indications appeared to suggest an update by global cybersecurity firm CrowdStrike ‘seems to have been misconfigured in such a way that it wrecks (Microsoft) Windows’.
He told BBC Radio Four’s Today programme: ‘So if a company is using both CrowdStrike and Windows for its operating system, it seems that they get what people in the trade call the ‘blue screen of death’, and Windows doesn’t work.
‘And that’s why airlines aren’t able to process, presumably why Sky hasn’t been able to broadcast. It’s also why just simply for timezone reasons it seems to be emerging first in Australia.’
He said companies usually spend ‘a lot of time, money and effort’ making sure complex IT systems are compatible and can interact without something like this happening.
He said: ‘Most of the time that works. Occasionally, it doesn’t’, adding that it is ‘very rare to be as serious as this’.
The Port of Dover saw longer queues this morning, but said it is now operating as normal
UK Sky Sports Presenter Jacquie Beltrao posted on X: ‘We’re obviously not on air – we’re trying @SkyNews Breakfast’
Delhi Airport had a novel solution to the IT outage – writing departures on a whiteboard
The issue has hit computer services worldwide, with this shop in Australia saying it had closed
Consumer group Which? advised airline passengers to avoid checking in luggage if possible.
One traveller at Gatwick Airport said he had been queuing for more than three-and-a-half hours ahead of a flight to Miami, Florida.
Dean Seddon, 42, from Plymouth, said: ‘There are just people everywhere, there must be 400 people in this queue for the check in desk I’m at… it’s just bedlam.
‘It’s one of those things where you kind of know we’re not going to fly, but you don’t want to leave because you don’t know.
‘(Staff are) doing the best they can but they don’t actually know when it’s going to be fixed, so it is frustrating, but you kind of feel for the staff as well.’
Mr Seddon said there had been some people getting ‘agitated’ in the queue but overall travellers had remained calm.
Rory Boland, editor of magazine Which? Travel, said passengers due to travel today ‘will naturally be deeply concerned’.
He went on: ‘If you can, avoid checking in a bag as queues for check-in at the airport will be long and IT failures typically lead to lots of lost bags.
‘If you do check-in bags, make sure you keep medication, keys and any other essentials in your hand luggage.
‘As these are extraordinary circumstances, compensation will not be payable for delayed or cancelled flights, but airlines nonetheless have a duty to look after you, including providing meals and accommodation if it becomes necessary.
‘They should also reroute you as quickly as possible, though given the global nature of the problem, this may not be immediately possible.’
UK air traffic control provider Nats said its systems are ‘operating normally’.
One group of American tourists were forced to pay £5,262 for new flights home from Edinburgh Airport after original plans were cancelled.
Stephanie Thomson, heading home to Dallas, Texas, said her family, who were in the UK to attend Wimbledon and the Open Championship in Troon, were unable to reach British Airlines or American Airlines for support.
One tourists decides to take a relaxed approach at Palma Majorca Airport in Spain, which is one of many across the world hit by the shutdown
Large queues have been forming at Palma Majorca Airport as the IT issue hit on one of the busiest days for global aviation
Passengers wait in front of an empty departure display board at Berlin Brandenburg Airport this morning
There were chaotic scenes by the check-in counters at Berlin Airport following the outage
Passengers faced long queues to check in their bags at Heathrow Airport this morning
Passengers take a seat and wait out the delays at Heathrow Airport in West London this morning
The UK’s biggest airport is just one of many across the world that have been hit by the massive IT outage
Speaking from Edinburgh Airport, she said: ‘It was supposed to leave at 9.25am and change in Heathrow at 11 and we were supposed to get into Dallas later today.
‘We couldn’t get an answer from anybody. British Airways kept hanging up saying we have too many calls right now. I was on hold with American (Airlines) for about an hour and 10 minutes before I finally hung up.
‘We just paid 6,800 dollars for a one-way trip home, hopefully leaving tonight. I didn’t know what else to do. I just wanted something to get us home.’
Another US tourist, Debbie, and her family, said their flight to Boston was also cancelled.
Staff at London Stansted Airport handed out bottles of water to people queuing on a hot July day.
Carol Murphy, 58, who was queuing inside the terminal building for a Ryanair flight to go on a 10-day holiday to Vienna, said the situation was ‘nobody’s fault’.
‘They keep coming round and people who’ve got a flight upcoming, they send them forward,’ said the charity worker, of Ealing, west London.
‘I think they’re doing quite well.’
Student Jack O’Leary, who was queuing for a Ryanair flight to Dublin to go on holiday, said: ‘We’re quite understanding – it’s a global outage and everything’s pretty chaotic.’
The 27-year-old, from near Cambridge, added: ‘We’re very much in stasis mode waiting for something to happen and hoping we can get to Dublin today.’
Just two months ago Microsoft was hit with another major outage after Bing.com, Microsoft‘s search engine, went down with the problem apparently spreading to the brand’s application programming interface which means that services such as DuckDuckGo also went down.
According to reports the outage also impacted ChatGPT and Ecosia. Despite Google‘s dominance in the world of web searching, Bing’s API has numerous high profile clients.
In various reports on X, users said that they were either greeted with a blank page or a 429 HTTP code error when they attempted to log on.
Users claimed that both Bing.com and DuckDuckGo were loading but neither were producing search results when a query was typed.
Long queues forming at Palma Mallorca Airport in Spain as the global aviation system was thrown into chaos
The outage coincided with an extremely busy day for global aviation. Pictured is the scene at Palma Mallorca Airport
People wait for their flights at Berlin Airport in Germany after departure information stopped showing
The outage caused mass confusion after passengers were unable to see the times of their departures
Passengers were left queueing at check-in desks in Berlin to try and receive information from airline staff
Queues stretched around the terminal at Hamburg Airport following the Microsoft outage
A second aerial photo of a busy Terminal 1 at Hamburg Airport this morning
Thousands of holidaymakers queue at Stansted Airport, which is heavily used by holidaymakers heading to the Continent
Chaotic scenes at Stansted were repeated at airports around the world
