A major datacentre project in Loughton, Essex, heralded by the UK government as the nation’s largest AI supercomputer, will not meet its planned debut next year and could face delays extending into the early to mid-2030s. The facility is being developed by Nscale, a domestic startup pursuing a substantial public flotation this year.
Power infrastructure limitations have emerged as the primary obstacle to the project’s timeline. UK Power Networks, the utility company responsible for connecting the site to the local electricity grid, reportedly informed Nscale that the grid cannot provide the necessary power capacity until the early to mid-2030s. The supercomputer facility requires up to 90MW of electrical capacity, equivalent to the energy consumption of approximately 315,000 households. Nscale stated its continued commitment to the initiative and indicated it is exploring alternative solutions, including onsite power generation and accelerated connection procedures.
The project has faced multiple setbacks, including earlier revelations that the Essex location remained an active scaffolding yard at the time of the announcement in 2025. That site has since been cleared. The government, led by Prime Minister Keir Starmer, previously promoted the Loughton datacentre when unveiling the UK’s AI strategy, designating it as a “largest UK sovereign AI datacentre.”
The power supply challenges highlight broader capacity issues affecting datacentre development across the sector. Ofgem, the energy regulator, identified a significant backlog in electricity connection applications, with 315 datacentres currently awaiting grid connections and representing 73GW of total demand—substantially exceeding the nation’s peak electricity consumption of 45GW. Both UKPN and National Grid acknowledged the need for coordination across multiple infrastructure levels to address these constraints and facilitate future connections.
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