OpenAI has shelved Stargate UK.

This was supposed to be the centrepiece of Britain’s AI ambitions — a £31 billion investment, part of the UK-US tech deal announced last September, with US companies pouring money into British datacentre infrastructure. The government put it at the heart of its growth strategy. Tech secretary Peter Kyle called a supercomputer in Essex “the largest UK sovereign AI datacentre” that would be operational by the end of 2026.

A year later, it’s a scaffolding yard.

What’s interesting isn’t just that OpenAI pulled out. It’s the reason. High energy costs and regulatory uncertainty. The UK’s energy infrastructure simply cannot support the kind of compute infrastructure AI demands — and that wasn’t a secret. It was pointed out repeatedly. The government chose to chase the headline instead of doing the hard work of building the foundations.

The political criticism has been sharp. Liberal Democrat MP Victoria Collins called it “a wake-up call.” Labour MP Clive Lewis was brutal: “When a government has no economic strategy worthy of the name and no real industrial vision, it becomes vulnerable. The Silicon Valley companies that flew into London knew exactly what they were dealing with: a prime minister and a technology secretary desperate to project momentum, willing to dress up press releases as policy.”

He’s not wrong.

The broader context is that many of the UK’s AI deals have turned out to be phantom investments. A Guardian investigation last month revealed the scale of the overpromising. The supercomputer that was supposed to be running by 2026 was being built by a company that had never built a datacentre before.

There is a lesson here that’s larger than OpenAI. Britain wanted to build sovereign AI capability by outsourcing it to American companies. That was always a peculiar strategy — you don’t develop sovereignty by depending on someone else’s infrastructure, their chips, their policies. If OpenAI decides tomorrow that the UK isn’t worth their time, the sovereign compute disappears.

The UK government says it’s still “working with OpenAI.” But OpenAI’s exact commitments were always vague — they said they’d “explore the offtake” of 8,000 Nvidia chips. That’s not a contract. That’s a press release.

The energy costs aren’t getting easier. The US-Israel war on Iran has pushed oil prices higher, and that ripples through to electricity costs. Datacentres need enormous, reliable, cheap power. The UK can’t currently offer that at scale.

What should have happened: the government should have sorted out energy infrastructure first, established clear regulatory frameworks second, and only then gone shopping for investment. Instead it tried to do everything backwards — sign the deals, then figure out the rest later.

It didn’t work.

The question now is whether this prompts a genuine rethink, or whether ministers will find another headline to chase. Based on the track record, I’d bet on the latter.