The UK and US are set to sign two linked agreements at the Global Fusion Summit in London on September 14, 2026, aiming to accelerate fusion research through artificial intelligence and advanced computing while coordinating regulation. The centerpiece is a formal high-performance computing partnership between the UK Atomic Energy Authority and the US Department of Energy's Princeton Plasma Physics Laboratory. A separate joint regulatory statement will seek to align licensing frameworks and streamline the path from experimental reactors to commercial fusion power plants. The UK government projects more than 10,000 new fusion-sector jobs by 2030. The agreements build on the 2025 Technology Prosperity Deal, which identified AI, civil nuclear and fusion technologies as strategic priorities for UK-US cooperation. They complement the UK's more than £2.5 billion, five-year fusion investment announced in June 2025, as well as initiatives covering fusion materials, the STEP prototype plant and AI infrastructure. The UK is also seeking to attract investment to a potential global fusion market estimated at £3 trillion to £12 trillion.