This issue is now resolved.
We take a lot of pride in running a robust, reliable service and we're working hard to make sure this does not happen again. A detailed postmortem will follow once we've concluded our investigation.
Jul 31, 04:50 BST
We have implemented a fix for this issue.
We are monitoring closely to make sure issue has been resolved and everything is working as expected. Please bear with us while we get back on our feet and we appreciate your patience during this incident.
We will provide a further update in 30 minutes
Jul 31, 04:31 BST
The issue has been identified and a fix is being implemented.
We will provide a further update in 15 minutes
Jul 31, 04:15 BST
We're currently experiencing elevated error rates impacting document checks.
We will provide an update in 30 minutes
Jul 31, 03:48 BST