PERMANENT AWARD EVIDENCE

STEP Construction Partner

UK Atomic Energy Authority · published 22 Apr 2026. This page preserves the identifiers and current held fields for one Contracts Finder release; it is not an invoice, performance assessment or complete contract history.

Contracts Finder release ID55501510-06d2-4ce2-a694-cc4b78f6e508-894057
Open Contracting ID (OCID)ocds-b5fd17-ea265eae-7b7b-4fa1-9582-a951015d8c27
Buyer identifierGB-CFS-313891
Release typeaward
PUBLISHED COMMERCIAL FIELDS

Values stay separate.

A tender estimate and an award value answer different questions. Neither is treated as cash paid.

Award value
£10,000,000,000
award field
Tender value
£1
tender field
Procurement method
Competitive dialog
Category
works
CPV
45220000
Engineering works and construction works
Delivery
British Oversea Territories
No postcode
PUBLISHED DESCRIPTION

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.

Tender statuscomplete
STAGE-DATE LEDGER

Reported dates, without an invented lifecycle.

The current projection contains one award release, not a verified chain of planning, tender, award, contract and modification records. Dates are shown in source-field order and are not silently repaired.

  1. 01Notice publishedPublication timestamp on the held release22 Apr 2026
  2. 02Tender period endsTender-period field as published17 Jul 2024
  3. 03Contract startsContract-period field as published1 Apr 2026
  4. 04Contract endsContract-period field as published31 Mar 2029
SUPPLIER EVIDENCE

Published names and exact identifiers

A company profile appears only when this release carries a usable company number. Name-only suppliers remain name-only.

Published name only

ILIOS

No legal entity is inferred from this supplier name.

SOURCE

Contracts Finder release

Published 22 Apr 2026 · held through the daily award projection · Open Government Licence v3.0.

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