OpenAI pauses UK data‑centre plan

OpenAI spent September 2025 telling Britain it would help build local artificial intelligence computing power, and by April 9, 2026 it had put that plan on pause. The company told reporters it would wait until energy costs and regulation made “long-term infrastructure investment” workable. (openai.com, cnbc.com) The paused project was called Stargate UK, and it was supposed to be built with Nvidia, which makes the chips, and Nscale, a British infrastructure company, which was lining up sites and power. OpenAI said in September that the first phase could involve up to 8,000 graphics processing units in early 2026 and later scale to 31,000. (openai.com, nscale.com) This was not a generic warehouse full of servers. OpenAI pitched it as “sovereign” computing, meaning its models would run on machines physically in Britain for work like public services, finance, research, and national security where location and legal control matter. (openai.com) One planned location was Cobalt Park in northeast England, inside a new “Artificial Intelligence Growth Zone” that the British government had been using as proof it could attract heavyweight computing projects. Prime Minister Keir Starmer called the September package a “decisive step” toward making the country a world leader in artificial intelligence. (openai.com, nscale.com) The problem is that an artificial intelligence data centre is basically a giant electricity contract with walls around it. OpenAI told CNBC that Britain’s energy costs were too high, and outside reporting said industrial electricity prices there were roughly four times United States levels. (cnbc.com, thenextweb.com) Power is only half of it, because getting connected to the grid in Britain has become its own bottleneck. On March 11, 2026, the UK government said the queue for demand connections had grown 460% in six months and that some projects faced waits of up to 15 years. (gov.uk) The energy regulator Ofgem said in December 2025 that delays were costing developers tens of millions of pounds and pushing some projects years past their original connection dates. It said the 2026 reform plan specifically covered energy-hungry sites including data centres. (ofgem.gov.uk) The regulatory question was not just wires and substations. Britain has also been reworking its rules for how artificial intelligence companies can use copyrighted material, and on March 18, 2026 the government said a broad copyright exception with an opt-out was no longer its preferred approach after consultation backlash. (gov.uk, cnbc.com) That leaves OpenAI stuck between two kinds of uncertainty at once: nobody can give a clean long-term answer on the cost of power, and nobody can give a clean long-term answer on the rules for training and deploying models. For a project meant to run for years and consume huge amounts of electricity, “we’ll sort it out later” is not a financing plan. (cnbc.com, gov.uk, gov.uk) Bloomberg reported that the pause also fits a wider shift inside OpenAI toward tighter spending ahead of an expected public listing. In other words, Britain’s problems landed just as OpenAI was becoming more selective about which giant infrastructure bets it wanted to carry on its own balance sheet. (bloomberg.com) Nscale has said its broader UK buildout still includes up to 58,640 Nvidia graphics processing units across multiple projects, including a separate Microsoft-linked site in Loughton, so the pause does not erase every British data-centre plan announced last year. But it does remove the highest-profile promise that OpenAI itself would anchor a local British computing stack. (nscale.com, cnbc.com) The sharpest read on this is that countries do not get artificial intelligence infrastructure just by declaring themselves hubs. They need cheap power, fast grid connections, and rules that stay still long enough for someone to spend billions. (openai.com, gov.uk, ofgem.gov.uk)