Through the consortium, the three companies intend to develop a fusion project that is commercially credible, deployable using existing enabling technologies, and capable of attracting private capital – consistent with the long-term goals of the government’s recently announced UK Fusion Strategy.
The UK Infinity Fusion Consortium combines Type One Energy’s 400 MWe Infinity Two stellarator fusion power plant design, AECOM’s leading engineering capabilities, and Tokamak Energy’s high temperature superconducting (HTS) magnet technology and manufacturing expertise in the UK. The consortium will use these capabilities to develop a UK Infinity Two fusion power plant project that will include participation by the broader UK fusion value chain spanning construction, finance, offtake and other supply chain partners.
The consortium aims to benefit from the UK’s significant investment in magnetic confinement fusion technology, supply chain capabilities, regulation, and power plant siting for the government’s STEP Fusion programme. It will also capitalise on the synergy and experience gained from the first-of-a-kind Infinity Two fusion power plant project at the Tennessee Valley Authority’s (TVA’s) Bull Run site in the USA, which is targeted for commercial operation in 2034. The TVA Infinity Two project is being supported by the US government’s own fusion programmes and provides a strong technical and programmatic foundation for the UK Infinity Two deployment project.
“The consortium will create a private-sector-led fusion commercialisation pathway complementing the STEP Fusion programme,” the partners said. “The UK Infinity Two project further scales growth of the UK fusion supply chain and accelerates time-to-market for this critical new energy source, while strengthening the country’s industrial base.”
“Fusion needs to be delivered, not just developed,” said Type One Energy CEO Chris Mowry. “This consortium brings together the core industrial capabilities in the UK and US required to deploy real-world fusion power plant projects that are commercially viable. By aligning fusion technology, advanced manufacturing, and power plant engineering, we are closing the gap between today’s energy innovation and tomorrow’s energy infrastructure. Our initiative is fully aligned with UK and US ambitions to be leaders in commercial fusion deployment.”
Warrick Matthews, CEO of Tokamak Energy, added: “This consortium puts Tokamak Energy’s transformative magnet technology and manufacturing expertise in the centre of another world-class fusion programme. Together, we can accelerate towards commercialising a new form of limitless, clean energy and, in combination with our role as STEP magnet systems partner, strengthen the UK supply chain’s leadership in global fusion.”
“Fusion represents one of the most important long-term energy solutions, offering a clean, safe and reliable source of power for future generations,” said AECOM CEO Troy Rudd. “Delivering on fusion’s potential requires disciplined engineering, well-established infrastructure delivery models and collaboration across the entire energy ecosystem. Through this consortium, AECOM is bringing its global experience in complex energy infrastructure to help lay the groundwork for commercial fusion projects that can scale with confidence, supporting the UK’s energy system while strengthening its industrial and infrastructure base.”
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(Image: Type One Energy)
Type One Energy’s Infinity Two is a stellarator fusion reactor – different to a tokamak fusion reactor such as the Joint European Torus in the UK or the ITER device under construction in France. A tokamak is based on a uniform toroid shape, whereas a stellarator twists that shape in a figure-8. This is intended to get round the problems tokamaks can face when magnetic coils confining the plasma are necessarily less dense on the outside of the toroidal ring.
In September last year, TVA issued Type One Energy a Letter of Intent to develop and build Infinity Two – a first-generation 350 MWe baseload power plant using the company’s stellarator fusion technology – with construction starting as early as 2028. Type One Energy completed the first formal design review of Infinity Two in May 2025. Final decisions and definitive agreements regarding the funding and construction of Infinity Two, as well as any agreements to purchase the energy output, are subject to TVA Board approval, regulatory review, and alignment with least-cost planning processes, amongst other things, TVA has previously said. In January this year, Type One Energy submitted the initial licensing application in preparation for the construction of Infinity Two at TVA’s former Bull Run fossil plant site in Clinton, Tennessee.
