Microsoft is reporting an outage affecting some systems in UK South. Please see the Azure status page for more details.
Azure Status Page
New update from Microsoft:
Starting at approximately 14:00 UTC on 14 SEP 2020, a subset of customers in UK South may experience connectivity issues when accessing Storage & Virtual Machines in this region. Services with downstream dependencies on these may also experience impact related to this issue.
This message was last updated at 14:45 UTC on 14 September 2020