Massive internet outage hits websites including Amazon, gov.uk and Guardian

Technical problem traced to network run by Fastly brings some sites down entirely

• What caused the internet outage that brought down Amazon, Reddit and Gov.uk?

A massive internet outage has affected websites including the Guardian, the UK government's website gov.uk, Amazon and Reddit. The issue made the sites inaccessible to many users for more than an hour on Tuesday morning.

The outage was traced to a failure in a content delivery network (CDN) run by Fastly. It began at about 11am UK time, with visitors to a huge number of sites receiving error messages including, Error 503 service unavailable" and a terse connection failure".