HN won't let me post the direct link as it's the same as yesterday's story about the downtime.
Linode has published a postmortem on their connectivity / power issues in London and Frankfurt. TLDR; their edge routers were incorrectly connected to redundant power supplies and they missed notifications from their co-lo provider about routine maintenance.
https://status.linode.com/incidents/8qnvzrfz7hg2