Britain and the United States have signed a sweeping technology agreement aimed at deepening cooperation in artificial intelligence, quantum computing and civil nuclear energy, alongside fresh investment pledges worth £31 billion ($42 billion) from leading American firms.
The so-called “Tech Prosperity Deal” was announced during US President Donald Trump’s second state visit to the UK, which features a day of ceremonial events at Windsor Castle hosted by King Charles and the royal family. Officials said the pact is designed to spur economic growth, scientific research and energy security on both sides of the Atlantic.
Prime Minister Keir Starmer called the agreement a landmark moment. “This deal has the potential to shape the future of millions of people in both our countries while delivering growth and security,” he said. Starmer, under pressure to revive Britain’s sluggish economy, has sought to position the UK as a hub for tech investment by favouring lighter regulation in emerging fields such as artificial intelligence—an approach closer to Washington than to the more interventionist European Union.
The United States is already Britain’s largest trading partner, and its technology giants have been expanding rapidly in the country. Microsoft, the biggest single investor under the pact, confirmed plans to spend £22 billion to grow its cloud and AI infrastructure, including Britain’s largest AI supercomputer in Loughton, north-east London. Chief executive Satya Nadella said the company wanted to ensure the US remained “a trusted and reliable tech partner for Britain.”
Nvidia, the California-based chipmaker, announced it would deploy 120,000 graphics processing units across the UK, its largest rollout in Europe to date. This includes up to 60,000 Grace Blackwell Ultra chips with UK-based Nscale, part of a partnership with OpenAI and Microsoft on the colossal Stargate supercomputing project. Nvidia vice president David Hogan said the investments would “truly make the UK an AI maker, not an AI taker.”
Google committed £5 billion, including a new data centre in Waltham Cross, north of London, and continued support for AI research through its DeepMind unit. Cloud firm CoreWeave pledged £1.5 billion to develop energy-efficient data centres in Scotland with DataVita, bringing its total UK investment to £2.5 billion.
Other firms announcing commitments included Salesforce, Scale AI, BlackRock, Oracle, Amazon Web Services and AI Pathfinder, with projects ranging from hundreds of millions to several billion pounds.
The Trump administration, which has been critical of European digital regulations and online safety rules, did not address those disputes in the pact. Instead, the focus was firmly on collaboration and securing America’s role as Britain’s top technology partner.
