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Open for bidsUnited KingdomServices£115,000,000Add to pipeline

STEP Engineering System Partners Procurement

UK Fusion Energy Ltd(buyer)

Published
Published 11 November 2026
Deadline
Deadline: 29 January 2027 (78 days left)

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Overview

UK Fusion Energy Ltd is procuring Engineering System Partners across five lots to support the delivery of the Spherical Tokamak for Energy Production (STEP) prototype fusion energy plant. The scope encompasses complex engineering design and infrastructure delivery services with an estimated total value of £115,000,000. Contracts will run for an initial term of two years with options to extend up to a maximum duration of four years, with submissions due by 29 January 2027.

Contracting authority

  • 2 live opportunities · 37 awarded contracts

    Abingdon, United Kingdom

    GB-PPON: PCRM-7973-DCBL

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Lots (5)

  • Breeder Blanket System Partner (BBSP)

    UKFE is seeking to establish a Breeder Blanket System Partner (BBSP) to lead the delivery of the Breeder Blanket System, working closely with UKFE and other partners. The BBSP will provide critical capabilities regarding the design, integration and the realisation of designs through to manufacture and operation of the Breeder Blanket System. This includes providing capabilities for management of all engineering data, responsibility for the detailed design of SPP systems, equipment and components and contracting through the supply chain. The BBSP will work with all the other STEP partners to ensure the delivery of the integrated design to support the delivery and operations of the SPP.

    £20,000,000
  • Fuel Cycle System Partner (FCSP)

    UKFE is seeking to establish a Fuel Cycle System Partner (FCSP) to support and then lead on the delivery of key fuelling and fuel cycle sub-systems, working closely with UKFE and other partners. The FCSP will provide critical capabilities regarding the design, integration and the realisation of designs through to manufacture, delivery and operation of the Fuel Cycle System. This will require design and delivery. The FCSP will work with all other partners to ensure the delivery of a coherent and safe integrated fuel cycle design. This will require the provision of embedded resources to tackle complex design integration challenges but also entail the delivery of significant set packages of design work requiring execution at pace and scale.

    £20,000,000
  • Test Operations Partner (TOP)

    UKFE is seeking to establish a Test Operations Partner (TOP) to lead operations of UKFE test facilities and associated test activities, working closely with UKFE and other partners. The TOP will be critical to building confidence in and further defining the SPP design, while establishing test and operational capabilities that can support its future development and the wider fusion industrialisation. The generated test data and conclusions from these activities will directly inform the design and safety justification of the SPP. The TOP is not expected to undertake detailed engineering design of facilities or Test Rigs, except where explicitly instructed. UKFE retains accountability for test requirements and engineering intent, whilst rig suppliers retain accountability for rig design.

    £35,000,000
  • Control System Partner (CSP)

    UKFE is seeking to establish a Control System Partner (CSP) to lead the delivery and integration of control systems across all areas of the plant, working closely with UKFE and other partners. The CSP will provide critical capabilities regarding the design, integration and the realisation of designs through to manufacture and operation of the plant control systems. This includes providing capabilities for management of all engineering data, responsibility for the detailed design of SPP control systems, equipment and components and contracting through the supply chain. The CSP will work with all other STEP partners to ensure the delivery of the integrated design to support delivery and operations of the SPP.

    £15,000,000
  • System Engineering and Whole Plant Integration Partner (SEWPIP)

    UKFE is seeking to establish a Systems Engineering and Whole Plant Integration Partner (SEWPIP) to provide critical capabilities, primarily within the Design Authority (DA) but also within the wider Integrated Projects Teams, to enable the STEP DA to discharge its responsibilities effectively during Tranche 2A. This includes providing SEWPIP capability to support the definition, coordination, and integration of the fusion plant systems to ensure a functional, safe and efficient single operational facility outcome. The SEWPIP will work alongside the DA and other STEP partners to ensure the integration of design to support the overall outcome of the programme.

    £25,000,000

Key details

Country
United Kingdom
Status
Open for bids
Category
Services
Estimated value
£115,000,000
Procedure
Competitive flexible procedure
Rules
Procurement Act 2023
SME suitable
Yes
Published
11 November 2026
Questions by
8 January 2027
Deadline
29 January 2027
Classification (CPV)
Miscellaneous special-purpose machineryRepair and maintenance services of electrical and mechanical building installationsEngineering servicesEngineering design servicesMiscellaneous engineering servicesEngineering-related scientific and technical servicesTechnical testing, analysis and consultancy servicesSystems and technical consultancy services+6 more

Competition and scoring criteria

Expected competition

4

Median bids on comparable tenders

Open and restricted tenders in Industrial machinery drew a median of 4 bids over the last 24 months; 15% received only one.

How bids will be scored

Price 30% · Quality 70%

  • Commercial30%
  • Technical50%
  • Social Value10%
  • Economic Value10%

Price and cost criteria in black, quality in blue.

Market context

Typical award in Industrial machinery

£126,633

Median of 1,947 awards in the last 24 months

UK Fusion Energy Ltd in the last 12 months

43

contracts awarded, worth £10,102,456,028 in total

See their procurement profile →

Recent awards in Industrial machinery

The latest contracts other buyers awarded under the same classification.

Notice history

Every published notice in this contracting process, newest first.

  1. Contract Notice

    11 November 2026

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