Global malfunction hits airlines, banks, news outlets, health systems around the world. Crowdstrike Chief admits outage could take time to fix.

An apparent global malfunction linked to the IT security firm Crowdstrike on Microsoft’s Windows operating system has caused worldwide outages at banks, airlines, news outlets, health systems and other organizations around the world.

The airport in Berlin has halted flights, the UK health booking system is offline and Australian media outlets as well as British Sky News are not operational as a result of the outage which appears to be linked to the same software glitch.

A number of major airlines including Delta, United and American Airlines temporarily halted flights, while several airports around the world said their activities were affected, including all airports in Spain.

The boss of the cybersecurity firm responsible for worldwide IT outages admits it could be “some time” before all systems are back up and running

While the software bug has been fixed, experts say the manual reboot of each affected Microsoft computer will take a huge amount of work

Thousands of flights have been cancelled, with banking, healthcare and payment systems all affected

In the UK, GPs have been struggling to access records, pharmacies have been hit and TV channels knocked off air.

More than 5,000 flights cancelled globally.