I eventually see the below whilst trying to access the admin pages on Office 365:
We are sorry, something went wrong.
Please try refreshing the page in a few minutes. If the problem persists, please visit status.office.com for updates regarding known issues.
Ref A: 0831DDAB05B24F24B80994E50BD1A668 Ref B: LON21EDGE0921 Ref C: 2020-10-13T12:30:11Z