Nottinghamshire, UK — March 2026 — VINCI, through its subsidiary VINCI Construction, has secured a £200 million design-build contract for a major fusion energy project in the United Kingdom, marking a significant milestone in the country’s transition toward low-carbon energy.
The contract has been awarded by UK Fusion Energy, a government-backed initiative (formerly UK Industrial Fusion Solutions), to the ILIOS consortium, led by Nuvia, a VINCI Construction subsidiary specializing in nuclear engineering and services.
Major Step Toward Fusion Energy Development
The project forms part of the Spherical Tokamak for Energy Production (STEP) programme, an ambitious initiative aimed at delivering a prototype fusion power plant by 2040.
Fusion energy, often described as the “holy grail” of clean energy, has the potential to provide safe, low-carbon, and virtually limitless power, making it central to long-term global energy strategies.
The VINCI STEP fusion energy project UK highlights the increasing role of large infrastructure firms in advancing next-generation energy technologies.
Scope of the £200 Million Contract
The 4.5-year contract, valued at approximately €230 million, covers Phase 1 of the project and includes:
- Design and construction of key buildings
- Development of site infrastructure and facilities
- Delivery of essential support systems for the fusion programme
Approximately 50% of the contract value will be executed by Nuvia, reinforcing its expertise in complex nuclear and energy infrastructure.
Consortium Driving the Project
The ILIOS consortium brings together a group of leading engineering, design, and construction firms, including:
- Nuvia (lead contractor)
- Kier Group
- AECOM
- AL_A
- Turner & Townsend
This collaboration combines expertise across engineering, architecture, project management, and infrastructure delivery, ensuring the project meets the technical and operational demands of fusion energy development.
Building on Global Fusion Expertise
VINCI Construction’s involvement in the STEP programme builds on its existing role in the ITER project in Cadarache, one of the world’s largest and most advanced fusion research initiatives.
This experience positions VINCI as a key player in the global push toward commercial fusion energy solutions.
Supporting the UK’s Low-Carbon Energy Goals
The STEP programme is a cornerstone of the UK’s strategy to achieve net-zero emissions and reduce reliance on fossil fuels.
By investing in fusion technology, the UK aims to:
- Develop a sustainable and reliable energy source
- Strengthen energy security
- Lead innovation in clean energy technologies
Projects like the VINCI STEP fusion energy project UK are expected to play a critical role in shaping the future energy mix.
About VINCI
VINCI is a global leader in construction, concessions, and energy solutions, employing approximately 294,000 people across more than 120 countries. The company specializes in designing, financing, building, and operating infrastructure that supports economic development and improves quality of life.
Outlook
The award of this contract marks a significant advancement in the UK’s fusion energy ambitions and reinforces the growing importance of public-private partnerships in delivering complex, large-scale energy infrastructure.
As the STEP programme progresses, it is expected to position the UK at the forefront of fusion energy innovation, with long-term implications for global clean energy development.
