UK and US agree $42 billion tech pact to mark Trump's visit

U.S. President Donald Trump and first lady Melania Trump are greeted by Viscount Henry Hood, representing Britain's King Charles, as they arrive for their state visit to Britain, at London Stansted Airport near London, Britain, September 16, 2025. REUTERS/Chris Radburn

LONDON (Reuters) -Britain and the United States have agreed a technology pact to boost ties in AI, quantum computing and civil nuclear energy, with top U.S. firms led by Microsoft pledging 31 billion pounds ($42 billion) in UK investments.

The "Tech Prosperity Deal" is part of U.S. President Donald Trump's second state visit to Britain, which will include a day of pomp at Windsor Castle on Wednesday, hosted by King Charles and the royal family.