AwardedAwarded 2 April 2026
STEP Construction Partner (CP)
United Kingdom Fusion Energy · Public body
In brief
United Kingdom Fusion Energy awarded construction and consultancy work to Ilios on 2 April 2026.
It is let as a single contract: Construction Partner.
Built from the notice's own fields. Always check the official notice before you bid.
What the notice says
UKIFS (now UKFE) has conducted this Procurement for a Construction Partner, who, together with a Fusion Partner (determined to be United Kingdom Atomic Energy Authority (UKAEA)), will bring together and develop extensive industrial capabilities to design and build a UK prototype fusion energy plant capable of delivering net-energy to the grid, and build a world-leading fusion delivery industry.
The Procurement was originally divided into two lots:
• Lot 1: Engineering Partner (EP)
• Lot 2: Construction Partner (CP)
However, Lot 1 – EP has since been cancelled. Lot 2 – CP is now the only Lot included in this Procurement exercise.
The contract term for Lot 2 will expire 31 March 2029, followed by three (3) optional extension periods of four (4), six (6) and seven (7) years.
UKFE will have the right to exercise an extension option at six (6) months’ notice. The maximum contract duration will be twenty (20) years with an estimated value of £10,000,000,000 across this period.
Who won
| Winner | Value | Dates |
|---|---|---|
| Ilios 3 bids received | £10,000,000,000 |
Values as the award notice gives them, excluding VAT where stated.
Timeline
- Contract award notice · notice 036554-2026
About the buyer
United Kingdom Fusion EnergyLast 12 months
Procurements
1Awards
1Suppliers it has used most for construction
- Ilios1 contract
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From notice 036554-2026 on Find a Tender, first published 22 April 2026. We last checked for changes on 28 September 2026.