A swathe of apps and online services have gone down on Monday morning, including Zoom, Slack and Coinbase.
This follows a global Amazon Web Services (AWS) outage, with knock on effects hitting millions of users of thousands of apps and websites.
The high street bank Halifax is affected, as are HMRC online services.
Since the outage, an AWS spokesperson has said: “We have identified a potential root cause for error rates for the DynamoDB APIs in the US-EAST-1 Region.”
The company added: “We are seeing significant signs of recovery.”
“We continue to work through a backlog of queued requests. We will continue to provide additional information.”
Meanwhile, the BBC has reported on instances of customers experiencing banking outages, with some saying that cards have been declined.
Though the BBC has not been able to independently verify these reports, and they are not confirmed to be directly linked to the AWS outages, there have been thousands of instances.
Elsewhere, top dating app Hinge is down, as are gaming services from Playstation Network to Epic Games Store.
Just how much of the internet is affected?
Down Detector has told the BBC that it has seen more than four million reports of issues on Monday morning, up from a normal level of 1.8m.
According to Down Detector, here here are the websites and apps which are currently listed as experiencing technical issues:
Snapchat
Lloyds Bank
Ring
Halifax
AWS
Roblox
Zoom
Amazon
Life360
My Fitness Pal
Xero
Signal
HMRC
Bank of Scotland
Slack
Amazon Alexa
Canva
Blink Security
BT
Fortnite
Epic Games Store
Asana
Vodafone
EE
Smartsheet
Virgin Media
Hinge
Wordle
Clash Royale
IMDB
Duolingo
Amazon Prime Video
Microsoft 365
Eventbrite
Jira
Pokemon Go
Ancestry
Sky
Amazon Music
Playstation Network
Coinbase
Pelaton
Strava
Atlassian
Microsoft Store