Britain wants to be an AI superpower. One of its flagship data centres cannot get the electricity to switch on. Nscale’s £2bn Essex site has the money, the planning permission, and a grid connection, but no power arriving in time.
Nscale has the cash, the site, and the customer. What it does not have is a plug.
The British AI firm, backed by Nvidia, is building a £2bn data centre at Loughton in Essex, with Microsoft signed up as its anchor tenant. It won planning permission and a 90-megawatt grid connection. Then it learned the power would not arrive in time to open the site next year, Sifted reported.
So the company is now shopping for its own electricity. It is looking at on-site generation, including reported talks with a California fuel-cell maker, rather than waiting on the National Grid. “We remain fully committed to the Loughton project,” a spokesperson said.
The queue nobody can skip
Nscale’s problem is not really Nscale’s. It is Britain’s.
Grid-connection times have become the single biggest brake on new data centres. Some UK projects face waits stretching close to a decade for enough power. One estimate found more than a quarter of data-centre capacity slipped in 2025 alone.
The workaround is increasingly to go off-grid. More than 100 UK projects are now weighing gas generation while they wait, according to industry data. That is an awkward answer for a government trying to electrify the economy and clean up its power at the same time.
Ambition meets physics
The politics are uncomfortable. Sir Keir Starmer’s government has made data centres a pillar of its growth plan and named them critical national infrastructure. The grid has not kept pace.
“Britain’s dreams of data centre sovereignty will disappear if we don’t get a grip on the grid,” warned Taco Engelaar of the infrastructure firm Neara. One forecaster now expects the country to miss its 2030 clean-power target, reaching about 83% rather than 95%.
Nscale itself is not short of confidence, cash, or momentum. It grew its headcount 121% in the first half of 2026, one of Europe’s fastest-growing scaleups, and it raised a $900m credit facility only weeks ago. The bottleneck is physical, not financial.
A pattern, not an accident
The Essex delay is one instance of a fight playing out across the West. New York just became the first US state to freeze new data centres. Scotland’s governing party wants its own moratorium. In the US, the boom has set off the largest gas-plant building spree in history. Researchers warn Europe’s sovereign-AI plans could stall on the same limits.
The lesson is simple and unwelcome. AI is sold as software, but it runs on electricity. And electricity, unlike capital, cannot be raised in an afternoon.
