https://gdsdata.blog.gov.uk/2015/09/21/scheduled-performance-platform-downtime-on-22-september/

Scheduled Performance Platform downtime on 22 September

GOV.UK is planning scheduled maintenance on our shared infrastructure from 7pm on Tuesday September 22. We expect normal service to resume by 11pm that day.

During this time dashboards will remain available but live feeds will become static.

It will not be possible to provide new data (via upload or the write API) whilst we complete this work.

The GOV.UK status page will be kept up to date throughout.