Cannot see any documentation for SharePoint at the moment:

The site is partially down.
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The en-gb locale isn't one that is supported. Leave the locale off and it redirects to the correct location.
It's not really a SharePoint issue, rather one with the entire docs.microsoft.com platform (including Azure: https://docs.microsoft.com/en-gb/azure)... nothing we can do here, but I've raised it to their attention to investigate. Closing as it's not a SharePoint issue...
The site redirects to that locale, but ok thanks for looking into this and forwarding to the team.
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