Datacentre investment boom is one of the biggest infrastructure gambles of this era, and Britain may be uniquely exposed Stargate was to be the world’s biggest AI investment: a $500bn infrastructure project to “secure American leadership in AI”. Never shy of hyperbole, its key backer, the ChatGPT-maker OpenAI, promised “massive economic benefit for the entire world” with facilities to help people “use AI to elevate humanity”. Now, OpenAI appears to be dropping out of a part of the deal – the