STEP Construction Partner (CP)
A Contract Award Notice
by UNITED KINGDOM FUSION ENERGY
- Source
- Find a Tender
- Type
- Contract (Works)
- Duration
- 3 year (est.)
- Value
- £10B
- Sector
- CONSTRUCTION
- Published
- 22 Apr 2026
- Delivery
- To 21 Apr 2029 (est.)
- Deadline
- n/a
Related Terms
Location
Abingdon
2 buyers
- United Kingdom Fusion Energy Abingdon
1 supplier
- Ilios Salford
Description
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.
Total Quantity or Scope
The Construction Partner’s (CP) primary responsibility will be to collaboratively provide the capability to drive the integrated design of the overall layout, buildings, infrastructure, onsite and offsite facilities of the STEP Prototype Plant (SPP) to fulfil the support, enclosure and environmental requirements of the operational plant. The CP will then purchase, fabricate, deliver and install all elements of the designed facilities utilising existing and new supply chains, directly sourced or contracted resources. The CP’s responsibilities will include (but not be limited to) managing the overall health, safety, environment and security systems applicable to all parties engaged at the site.
Award Detail
| 1 | Ilios (Salford)
|
Award Criteria
| Corporate: Economic Value | 15.0 |
| Corporate: Social Value | 10.0 |
| Programme | 17.0 |
| Technical | 18.0 |
| Cultural: Behavioural and Collaborative Assessment | 15.0 |
| Contractual Compliance | _ |
| PRICE | 25.0 |
CPV Codes
- 45220000 - Engineering works and construction works
- 45200000 - Works for complete or part construction and civil engineering work
- 45213250 - Construction work for industrial buildings
- 45214610 - Laboratory building construction work
- 45222000 - Construction work for engineering works except bridges, tunnels, shafts and subways
- 45223000 - Structures construction work
- 45251000 - Construction works for power plants and heating plants
- 45251100 - Construction work for power plant
- 45251110 - Nuclear-power station construction work
- 45251111 - Construction work for nuclear reactors
- 45254200 - Construction work for manufacturing plant
- 71500000 - Construction-related services
- 71520000 - Construction supervision services
- 71521000 - Construction-site supervision services
- 71530000 - Construction consultancy services
- 71540000 - Construction management services
- 71541000 - Construction project management services
- 79418000 - Procurement consultancy services
Indicators
- Award on basis of price.
Other Information
Lot 1 for the Engineering Partner (EP) was cancelled and will not be awarded. Only Lot 2 for the Construction Partner (CP) forms part of this notice. UKAEA is launching this procurement on behalf of UK Industrial Fusion Solutions Limited (UKIFS). UKIFS will take over responsibility for running the procurement when it is established part way through the procurement process and will be the client entity that will enter into the contracts at the conclusion of the procurement.
Reference
- FTS 036554-2026