Microsoft Abandons UK Supercomputer Project Over Grid Delays
AI-generated image · US National Wire
The tech giant's exit from a flagship Essex datacenter highlights a growing crisis where antiquated power infrastructure cannot keep pace with AI deployment.
As first reported by The Register, Microsoft has ended its deal with Nscale, a British AI infrastructure startup, for a planned supercomputer project located in Loughton, Essex.
Originally announced in September 2025 as part of a £22 billion UK investment, the project was intended to be the nation's largest sovereign AI datacenter. The facility was designed to house 23,040 Nvidia GB300 GPUs within a 50MW site, with potential expansion to 90MW, to support Microsoft's Azure cloud services. While the first chips were expected in early 2027, the project hit a critical bottleneck: electricity.
As reported by The Guardian, UK Power Networks warned Nscale that the necessary grid capacity might not be available until the early to mid-2030s. A spokesperson for UK Power Networks told The Register that while many datacenters can connect to distribution networks, they are often stalled by required works on the national transmission network.
This failure underscores a broader systemic issue. According to The Register, demand for new connections jumped from 41GW to 125GW in under a year, with datacenters making up at least 80GW of that total. To combat speculative projects clogging the queue, Ofgem proposed charging developers for connection requests earlier this year.
Nscale stated it remains committed to the Loughton project and is exploring alternative power sources, asserting that the "London-wide grid issue" does not affect its other contracts. Microsoft did not respond to requests for comment.