Wire · technology
Google Cloud pins London outage on PLC misconfiguration
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◆ Geography
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Fusion42 · 12 November 2026 · Fusion42 review
A power outage at Google Cloud's London region on 20 October was caused by a programmable logic controller misconfiguration that prevented emergency generators from starting, leading to a zone-wide blackout affecting multiple services and major UK banks. Google has reconfigured the PLC and started audits at other data centres to prevent recurrence.
This Wire brief sits within Fusion42's coverage of Cloud Infrastructure, and 2 sources have reported it between 12 Nov 2026 and 14 Nov 2026.
◆ ◆ The Wire takeaway
Your cloud design just lost its safety net. You must rethink failover plans now as even multi-zone setups failed when a single sensing error cascaded across Google Cloud’s only UK region.
◆ Coverage
2 sources · first reported 12 Nov 2026 · latest 14 Nov 2026
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