Image of UK Prime Minister Keir Starmer and US President Donald Trump. Photo Credits: Politico.eu

Britain and the United States have signed a sweeping technology pact aimed at deepening cooperation in artificial intelligence, quantum computing and civil nuclear energy, coinciding with U.S. President Donald Trump’s second state visit to the UK.

The “Tech Prosperity Deal” includes £31 billion ($42 billion) in investment commitments from top American firms, led by Microsoft, which will put £22 billion into expanding cloud and AI infrastructure, including Britain’s largest AI supercomputer to be built in Loughton, northeast London.

Under the pact, both governments pledged to work jointly on developing AI models for healthcare, advancing quantum computing capabilities, and streamlining civil nuclear projects to bolster energy security. UK Prime Minister Keir Starmer said the agreement would help deliver “growth and security” for millions on both sides of the Atlantic.

Starmer, under pressure to revive Britain’s sluggish economy, is pitching the country as a prime destination for high-tech investment by adopting lighter-touch regulation aligned more closely with U.S. approaches, in contrast to the European Union’s stricter oversight.

The deal also marks a renewed chapter in U.S.-UK commercial ties after tensions during past disputes over digital taxes and online safety laws, though those issues were not part of the current negotiations.

Tech giants announced major new investments as part of the pact:

• Nvidia will roll out 120,000 GPUs across the UK, its largest European deployment to date, including up to 60,000 Grace Blackwell Ultra chips with UK firm Nscale, in collaboration with OpenAI and Microsoft.

• Google committed £5 billion, including a new data centre in Waltham Cross and expanded support for AI research via DeepMind.

• CoreWeave pledged £1.5 billion for energy-efficient data centres with Scottish partner DataVita, bringing its total UK investment to £2.5 billion.

Other firms, including Salesforce, Oracle, Amazon Web Services, BlackRock, Scale AI and AI Pathfinder, announced commitments ranging from hundreds of millions to several billion pounds.

Satya Nadella, Microsoft’s chair and CEO, said the company aimed to ensure America remained “a trusted and reliable tech partner for Britain.” Nvidia executive David Hogan said the scale of investment would “truly make the UK an AI maker, not an AI taker.”

Trump’s visit will feature a day of royal ceremony at Windsor Castle on Wednesday, hosted by King Charles and members of the royal family.