The outage has affected cities across the world.
A massive Twitter outage has hit parts of the UK, with thousands of users reporting they are unable to see new posts or refresh their timelines.
The problems began around 5pm, according to the site Down Detector.
The Twitter site and app will still load but only old tweets are displayed. According to users affected by the issue, refreshing the feed fails to load new posts.
Other users report their timelines are out of order, with old posts appearing at the top of the feed.
The issue doesn't appear to be affecting Tweetdeck, Twitter's own specialist client for the site.
According to Down Detector, the Twitter outage is affecting users across the world, including the US and Europe.
