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AwardedUnited KingdomWorks£1Add to pipeline

STEP Construction Partner

Awarded to ILIOS

UK Atomic Energy Authority(buyer)

Published
Published 22 April 2026
Deadline
Closed 17 July 2024
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Overview

The UK Atomic Energy Authority (via UKFE) has awarded a construction partner contract to ILIOS valued at £10 billion for designing and building a UK prototype fusion energy plant capable of delivering net energy to the grid. The contract, which commenced in April 2026, runs until March 2029 with optional extension periods available, with a maximum duration of 20 years. This procurement originally included an engineering partner lot, which has since been cancelled, leaving only the construction partner scope.

Contracting authority

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Key details

Country
United Kingdom
Status
Awarded
Category
Works
Estimated value
£1
Procedure
Selective
SME suitable
Yes
Published
22 April 2026
Deadline
Closed
Classification (CPV)
Engineering works and construction works

Award outcome

Awarded value
£10,000,000,000
Award date
1 April 2026
Contract period
1 April 2026 → 31 March 2029
Winner
  • ILIOS

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Notice history

Every published notice in this contracting process, newest first.

  1. Contract Award Notice

    22 April 2026

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