IN a statement, the IT firm said:

CrowdStrike is actively working with customers impacted by a defect found in a single content update for Windows hosts.

Mac and Linux hosts are not impacted. This was not a cyberattack. The issue has been identified, isolated and a fix has been deployed.

We are referring customers to the support portal for the latest updates and will continue to provide complete and continuous public updates on our blog.

We further recommend organisations ensure they’re communicating with CrowdStrike representatives through official channels.

Our team is fully mobilized to ensure the security and stability of CrowdStrike customers.

We understand the gravity of the situation and are deeply sorry for the inconvenience and disruption.

We are working with all impacted customers to ensure that systems are back up and they can deliver the services their customers are counting on.

We assure our customers that CrowdStrike is operating normally and this issue does not affect our Falcon platform systems.

If your systems are operating normally, there is no impact to their protection if the Falcon sensor is installed.

We will continue to provide updates to our community and the industry as they become available.

Trains

• Govia Thameslink Railway (GTR) – urged passengers to expect disruption due to “widespread IT issues”
• Gatwick Express – warned travellers they are “currently experiencing widespread IT issues”
• South Western Railway – all ticket vending machines are currently non operational – buy tickets online
• National Rail – some train operators are unable to access driver diagrams at certain locations, leading to potential short-notice train cancellations
• TransPennine Express – some TPE stations and systems are having IT issues – buy tickets online
• New York City’s MTA system affected
• Washington D.C Metro trains – delayed

Airports and airlines

• Manchester Airport – delays for those checking-in for Swissport flights
• London Gatwick – passengers may experience some delays while checking in and passing through security but should still arrive for their normal check-in time
• Ryanair – advise passengers to arrive at the airport three hours in advance of their flight to avoid any disruptions
• Edinburgh Airport – wait times longer than usual
• Stansted Airport – some airline check-in services reverted to being done manually, but main operational systems are unaffected and flights are still operating as normal
• Luton Airport – running manual systems
• Heathrow Airport – affected but flights operational – check with airline on latest journey information
• American Airlines – all flights cancelled
• United and Delta – no flights taking off
• Allegiant Air and Spirit Airlines – flights grounded
• Frontier and SunCountry – affected by outage
• San Francisco Airport – passengers reporting suspended flights
• Mumbai Airport – check-in desks shut down for IndiGo, Akasa and Spice Jet flights
• Australian airline Qantas – flights grounded
• Schipol Airport in Amsterdam – flights to and from the Netherlands affected
• Spanish airport association AENA – reported issues at 42 airports
•  Rome’s Fiumicino Airport affected
• Ibiza Airport – empty due to IT outage
• Hamburg Airport in Germany affected
• BER Berlin Airport – Long queues
• The Hague Airport in Rotterdam – travellers experiencing longer wait times
• Narita International Airport in Narita, east of Tokyo – check-in delays
• Palma Mallorca Airport affected
•  Suvarnabhumi Airport in Bangkok – longer queues reported
• Hong Kong Express Airways passengers delayed at Hong Kong International Airport

Television Networks

• Sky News – Friday morning breakfast show unable to air but now back on screens with reporter reading from printed notes
• Paramount Global channels including MTV, VH1, CMT and Pop TV – bumped offline.

Britain’s GPs

• The Wilmslow Health Centre in Cheshire – without access to their IT systems
• Solihull Healthcare Partnership in the West Midlands – affected ability to book/consult with patients this morning
• Central Lakes Medical Group in Ambleside – stated there has been a “big effect” and delays on the phone expected
• Pocklington Group Practice in the East Riding of Yorkshire – appointments needing to be cancelled and rearranged
• Hulme Hall Medical Group, in Stockport – unable to offer any appointments
• Windrush Medical Practice in Witney, Oxfordshire – continuing as normal for urgent enquiries but ask for routine concerns to wait until Monday
• Grimethorpe Surgery in Barnsley – no access to the clinical system, EMIS Web 
• The National Pharmacy Association (NPA) confirmed the IT outage is disrupting community pharmacies
• A surgery in Putney, southwest London – Displaying an error message online to patients who attempt to book

Global hospitals

• Two German hospitals have been forced to cancel emergency operations
• The hospitals, in the northern German cities of Luebeck and Kiel, cancelled all elective operations scheduled for today

Supermarkets and restaurants

• Morrisons are affected
• Some Waitrose and Co-op are now cash only
• Gails and Waterstones experiencing some issues
• Wetherspoons pubs – only accepting cash
• Woolworths and Coles supermarkets in Australia – self service machines not working

Events

• Manchester United ticket release postponed – morning’s ticket release will be postponed until midday and website will remain unavailable

Banks and supermarkets in Australia including Beyond Bank Australia have also been experiencing issues this morning.

Various Microsoft services in Japan and New Zealand are also battling tech issues.