OpenAI has paused a major planned investment into UK artificial intelligence infrastructure, citing the nation’s prohibitively high energy costs and an uncertain regulatory landscape. The move deals a significant blow to the Labour government’s stated ambition of making Britain a global leader in AI.
The Stargate vision and its sudden pause
The stalled initiative, known as Stargate UK, formed part of a headline-grabbing UK-US AI deal announced last September, which saw US companies appear to commit £31bn to the UK’s tech sector with the aim to “mainline AI” into the British economy. At its core, the project was designed to bolster Britain’s “sovereign compute” – domestic infrastructure allowing the government and institutions to run AI models on home soil, a concept considered crucial for national data security.
Now, however, OpenAI has put the plans on hold. A company spokesperson stated it would wait for “the right conditions” to enable “long-term infrastructure investment”, while adding it “sees huge potential for the UK’s AI future” and continues to “explore Stargate UK.” The exact commitment had always been vague, centred on OpenAI potentially taking up the use of 8,000 high-powered Nvidia chips at data centres to be built by its UK partner, Nscale.
Energy costs and regulatory doubts scupper progress
The reasons behind the pause are twofold and deeply structural. Firstly, the UK’s industrial electricity prices are already the highest in Europe, a crippling disadvantage for energy-intensive data centre projects. This burden has been exacerbated by global energy market volatility linked to the US-Israel war on Iran, which is expected to delay or derail AI data centre projects worldwide. For operators in the UK, energy costs are reported to be up to four times more expensive than in the United States.
Secondly, OpenAI is understood to be concerned by regulatory uncertainty surrounding AI development and data centres in the UK. While the government has outlined ambitious strategies including a “Compute Roadmap” and plans to streamline data centre approvals, a clear, stable framework appears elusive. Andy Lawrence of the Uptime Institute suggested the overall demand for such sovereign compute projects was not yet apparent, stating “The whole sense of urgency has dissipated.”
The decision also comes amid a period of intense competition and strategic shifts for OpenAI, which recently announced the discontinuation of its Sora video-generation app. Tom Hegarty of the tech equity organisation Foxglove noted that OpenAI’s chief executive, Sam Altman, was racking up a “record of U-turns”, but added that this “hasn’t stopped ministers from jumping fully aboard the AI hype train.”
Political fallout and questions over ‘phantom investments’
The pause has ignited sharp political criticism. Ben Spencer, the shadow science minister, said: “When global firms cite high energy costs and regulatory uncertainty as reasons to walk away, it tells you everything about the direction of travel. For too long, Labour have prioritised courting big tech headlines while neglecting our domestic startups.”
Liberal Democrat spokesperson for science, innovation and technology, Victoria Collins MP, called it “a wake-up call for the government to manage energy costs in the UK and foundation infrastructure,” warning that Britain cannot be dependent on US tech companies to build sovereign capabilities.
The news follows a recent investigation which revealed that many of the deals to “mainline AI into the veins” of the British economy were “phantom investments”. It highlighted a separate supercomputer project, also involving Nscale and once scheduled for completion in 2026, which months later remained a scaffolding yard in Essex. Former technology secretary Peter Kyle had heralded it as “the largest UK sovereign AI datacentre” and “a fresh start for our economy”; Nscale has stated it aims to deliver that project in 2027.
A government spokesperson defended its record, stating: “Our AI sector has attracted more than £100bn in private investment since the government took office, with the sector growing 23 times faster than the wider economy last year. Our focus is on continuing to create the right conditions for investment in the UK’s AI and datacentre infrastructure. We are continuing to work with OpenAI and other leading AI companies to strengthen UK compute capacity.”
Nscale, a key player in the “neocloud” sector with active projects in Norway and the US, has been approached for comment regarding the Stargate UK pause.
