LONDON — The United Kingdom and the United States have signed a $42 billion “Tech Prosperity Deal” to coincide with U.S. President Donald Trump’s second state visit to Britain.
The agreement is aimed at boosting cooperation in artificial intelligence, quantum computing, and civil nuclear projects.
The pact, announced ahead of a day of royal ceremonies at Windsor Castle hosted by King Charles, is designed to support economic growth, scientific research, and energy security on both sides of the Atlantic.
British Prime Minister Keir Starmer hailed the deal as transformational. “This agreement has the potential to shape the future of millions of people on both sides of the Atlantic and deliver growth and security,” he said.
The U.S. remains Britain’s largest trading partner, with American tech giants already heavily invested in the UK. Starmer, under pressure to revive sluggish economic growth, has embraced the light-touch regulation approach favoured in Washington, distancing Britain from the more interventionist stance of the European Union.
Under the deal, Nvidia confirmed it will deploy 120,000 graphics processing units in Britain — its largest rollout in Europe. The company will also provide up to 60,000 Grace Blackwell Ultra chips in partnership with UK firm Nscale, supporting OpenAI’s Stargate project and Microsoft’s development of Britain’s largest AI supercomputer.
Microsoft pledged a £22 billion investment to expand its AI and cloud infrastructure, including a supercomputer facility in Loughton, north-east London. CEO Satya Nadella said the company aimed to strengthen the U.S.-UK technology partnership, while Microsoft president Brad Smith praised the improved relationship following Britain’s approval of its Activision Blizzard acquisition.
Nvidia’s vice president David Hogan described the move as a turning point: “These investments will truly make the UK an AI maker, not an AI taker.”
Google also announced a £5 billion investment for a new data centre in Waltham Cross and continued expansion of its DeepMind AI research hub. Meanwhile, U.S. cloud company CoreWeave pledged £1.5 billion for energy-efficient data centres with Scottish partner DataVita, raising its total UK commitment to £2.5 billion.
