For anyone wondering, 406 is neckbeard slang https://www.urbandictionary.com/define.php?term=406
A406 is also the North Circular.
It's also an HTTP status code.
And also a year, that started on a monday.
@tbc started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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For anyone wondering, 406 is neckbeard slang https://www.urbandictionary.com/define.php?term=406