TheTechno Optimist.

STEP FusionUK Fusion Energy—UK appoints ILIOS consortium as construction partner for STEP Fusion at West Burton, £200 million contract

UK Fusion Energy

STEP prototype fusion plant, West Burton, UK government fusion

GBgovernmentgov.uk (opens gov.uk)Checked 11 Oct

The brief

Analyst view
  • STEP transforms West Burton into the UK's prototype fusion plant to demonstrate net power generation.
  • ILIOS consortium appointed March 2026 for £200 million construction contract; operations targeted for 2040.
  • Peak construction supports 8,000 onsite jobs and anchors long-term economic growth in the region.

Technical approach

As reported
Spherical tokamak

Compact geometry for power plants

STEP's spherical tokamak is more compact and cost-effective than conventional designs.

Government-backed prototype

Proven at scale before commercial deployment

As a government-funded prototype, STEP demonstrates that fusion works as a power source at an industrial scale, reducing risk for commercial developers.

Primer