A major artificial intelligence supercomputer project in Loughton, Essex, originally scheduled to launch in 2027, is now facing potential delays until the early to mid-2030s due to difficulties securing adequate power supply. The site, promoted as the largest AI datacentre in the UK, has encountered significant challenges amid an ongoing national bottleneck in electricity grid connections.
The project is being developed by Nscale, a British startup planning a $35 billion flotation this year. Initially announced in 2025 by the UK government as a key component of the nation’s AI strategy, the Loughton facility is intended to serve as a sovereign AI datacentre, supporting a range of advanced technologies including AI chatbots. However, the site remains unable to connect to the necessary power grid capacity, hampering progress toward its planned commissioning.
Industry sources, citing UK Power Networks—the company responsible for linking the site to the local distribution network—have indicated that the grid cannot supply Nscale’s requested 90 megawatts of power, roughly equivalent to the electricity use of 315,000 homes, until infrastructure enhancements are completed. These upgrades are not expected to be completed until sometime in the next decade.
UK Power Networks declined to comment on the Loughton project specifically, but noted that many datacentres with large energy demands are waiting on wider upgrades to the national electricity transmission system, managed by the National Grid, before they can go online. The National Grid confirmed ongoing collaboration with government bodies, grid operators, and customers to explore opportunities to speed up connections and support economic growth.
Concerns about the project's timeline first emerged in March when reports showed the site was still an active scaffolding yard. Since then, Nscale has cleared the location and indicated it is exploring options for on-site power generation and ways to accelerate grid connections. The company affirmed its commitment to the project despite the setbacks.
The delay at Loughton highlights a broader issue facing the UK’s growing datacentre industry. In June, the energy regulator Ofgem revealed a substantial backlog, with 315 datacentres collectively seeking more than 73 gigawatts of grid capacity—far exceeding the nation’s peak electricity demand of 45 gigawatts. This imbalance presents a significant challenge for meeting the energy needs of rapidly expanding technology infrastructure.
The status of the Loughton supercomputer project underscores the critical interplay between technological ambition and energy infrastructure constraints, raising questions about how the UK will balance its AI development goals with the practical demands of power supply in the coming years.