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Clayton Locos Maintenance & Service

Sellafield Ltd

This public procurement record has 3 releases in its history.

Award

27 Aug 2026 at 13:14

UK7 - Contract Details Notice
Award

14 Jul 2026 at 15:49

UK6 - Contract Award Notice
Award

08 Jul 2026 at 15:44

UK5 - Transparency Notice
Summary of the contracting process

Sellafield Limited procured specialist maintenance and servicing for three Clayton locomotives used as critical operational assets across the Sellafield site. The requirement covers scheduled preventive maintenance, annual 12-month servicing, fault diagnosis and repairs, software and control-system support, spares, documentation and technical reporting. It is a services contract combining mechanical, electrical and locomotive engineering support with specialist software and controls expertise. The work supports keeping the locomotives safe, reliable and operational for Sellafield’s value streams. The relevant supplier profile is therefore a locomotive manufacturer or specialist rail engineering business able to maintain bespoke industrial locomotives and provide integrated control-system support, rather than a general vehicle maintenance provider or a standard railway software developer.

The procurement is complete and was awarded through a direct award. Sellafield Limited selected Clayton Locomotives Ltd on 1 July 2026, with the contract signed on 30 July 2026. The contract runs from 17 August 2026 to 16 August 2030. Its value is £477,185.33 excluding VAT and £572,622.40 including VAT. The requirement was treated as above threshold and comprised one lot. The buyer’s stated rationale was that the locomotives are bespoke Clayton assets and their operational software is subject to Clayton’s exclusive intellectual property rights, leaving the original manufacturer as the only supplier able to provide safe and compliant maintenance and support. The procurement classification includes railway traffic control software development services. Clayton Locomotives Ltd is the appointed supplier.

For suppliers assessing future Sellafield requirements, this procurement demonstrates demand for long-term, manufacturer-level support for a small fleet of bespoke industrial locomotives. A credible competitor would need proven locomotive design, manufacture or maintenance capability, with the engineering depth to deliver preventive servicing, annual inspections, fault finding, repairs and technical reporting. It would also need strong expertise in locomotive software, control systems and operational safety, including the ability to demonstrate lawful access to, or ownership of, the intellectual property needed to diagnose and modify integrated systems. Capacity to supply compatible spares, maintain documentation and provide responsive technical support would be important. The direct award rationale shows that exclusive technical rights and original-equipment knowledge were decisive, so a non-manufacturer would need an equivalent compliant access and support model.

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Notice Information

Notice Title

Clayton Locos Maintenance & Service

Notice Description

To deliver all preventive, corrective, and technical support activities necessary to maintain the three locomotives in a safe, reliable, and operational condition. This includes: * Scheduled preventive maintenance * Annual (12 month) servicing * Fault diagnosis and repairs * Software and control system support * Provision of spares, documentation, and technical reporting

Procurement Information

The locomotives are bespoke assets designed and manufactured by Clayton Locomotives Ltd (formerly Clayton Equipment Ltd), a specialist locomotive builder, and were procured by Sellafield Limited in 2021. These locomotives are used to support all value streams across the Sellafield site and are critical operational assets. Clayton Locomotives retains exclusive ownership of the Intellectual Property software controlling the locomotives' operation. Due to the integration of this software with the locomotives, and the absence of third parties with access to the necessary Intellectual Property, only the original manufacturer is capable of providing safe and compliant maintenance and support services.

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-06c6aa
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/081744-2026
Current Stage
Award
All Stages
Award

Procurement Classification

Notice Type
UK7 - Contract Details Notice
Procurement Type
Standard
Procurement Category
Services
Procurement Method
Direct
Procurement Method Details
Direct award
Tender Suitability
SME
Awardee Scale
SME

Common Procurement Vocabulary (CPV)

CPV Divisions

72 - IT services: consulting, software development, Internet and support

CPV Codes

72212140 - Railway traffic control software development services

Notice Value(s)

Tender Value
Not specified
Lots Value
Not specified
Awards Value
£477,185 £100K-£500K
Contracts Value
£477,185 £100K-£500K

Notice Dates

Publication Date
27 Aug 20262 weeks ago
Submission Deadline
Not specified
Future Notice Date
Not specified
Award Date
1 Jul 20262 months ago
Contract Period
17 Aug 2026 - 16 Aug 2030 4-5 years
Recurrence
Not specified

Notice Status

Tender Status
Complete
Lots Status
Complete
Awards Status
Active, Pending
Contracts Status
Active

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
Sellafield Ltd
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
WARRINGTON
Postcode
WA3 6GR
Postcode Area
Warrington
Country
England
Major Region (ITL 1)
TLD North West (England)
Basic Region (ITL 2)
TLD6 Cheshire
Small Region (ITL 3)
TLD61 Warrington
Delivery Location
Not specified
Local Authority
Warrington
Electoral Ward
Birchwood
Westminster Constituency
Warrington North

Supplier Information

Number of Suppliers
1
Supplier Name

Clayton Locomotives Ltd

Further Information

Notice Documents

Open Contracting Data Standard (OCDS)

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