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Tunnel Segment Production Monitoring System

Sizewell C Limited

This public procurement record has 1 release in its history.

Tender

12 Aug 2026 at 14:10

Tender Notice
Summary of the contracting process

Sizewell C Limited is seeking a tunnel segment production monitoring and traceability service for approximately 39,000 precast concrete tunnel segments. The requirement covers the complete lifecycle from casting through transport, storage and installation, with the purpose of improving reporting, quality traceability, inventory control, segment tracking and supply-chain transparency, while preventing installation errors and duplication. Segments will be manufactured at the Avonmouth tunnel precast factory, moved through a multi-modal logistics network using truck and rail interfaces, and stored at four facilities identified as TPF, Railhead, ACA and TLC. The system must support installation within three tunnel boring machines serving two intake tunnels and one outfall tunnel. This is a services procurement relating to tunnelling works.

The procurement has reached tender: Sizewell C Limited invited suppliers to submit offers through a tender process. The buyer set the offer deadline at 5pm on 14 August 2026. The contract is planned to run from 3 March 2027 to 3 December 2034, a period of almost eight years. Its estimated value is between £250,000 and £500,000, in GBP. The requirement is presented as a single procurement covering the monitoring and traceability service across production, logistics, storage and installation. The tender concerns work delivered across the Avonmouth production site, logistics interfaces, storage facilities and tunnel works. The opportunity is not reserved for SMEs or voluntary, community and social enterprises.

This opportunity suits technology and industrial-supply-chain specialists able to deliver end-to-end production monitoring and traceability for large-scale precast concrete operations. Relevant suppliers will need to track each tunnel segment from casting to installation, maintain reliable quality and inventory records, identify discrepancies, prevent duplicate records or installations, and provide clear reporting to multiple stakeholders. The service must work across factory production, truck and rail movements, storage at several facilities and installation by three tunnel boring machines. Firms with experience integrating operational data across manufacturing, logistics and major tunnelling or infrastructure projects are likely to be well placed. The scale favours suppliers with the capacity to support a long-running, multi-site operation and sustained data visibility throughout delivery.

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Notice Information

Notice Title

Tunnel Segment Production Monitoring System

Notice Description

This project involves the manufacturing, transportation and installation of approximately 39000 precast concrete tunnel segments. The segments will be produced at Avonmouth tunnel precast factory, transported through a multi-modal logistics network (truck and train interfaces), stored across 4 facilities (TPF, Railhead, ACA and TLC), ultimately installed within three TBMs serving two intake tunnels and one outfall tunnel configuration. This operation requires complete end-to-end visibility from the moment a segment is cast until it is installed within the tunnel structure. Currently, critical gaps exist in reporting, quality traceability, inventory discrepancies, and segment tracking across the supply chain. A comprehensive traceability system is essential to manage the entire lifecycle, prevent installation errors, ensure quality compliance, eliminate segment duplication, and maintain supply chain transparency across all stakeholders.

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-b5fd17-4c8ac5ca-44e3-478f-a326-edfd6d712bdd
Publication Source
Contracts Finder
Latest Notice
https://www.contractsfinder.service.gov.uk/Notice/37f4cf48-bafe-44cc-8c14-f89d74cc0bd8
Current Stage
Tender
All Stages
Tender

Procurement Classification

Notice Type
Tender Notice
Procurement Type
Standard
Procurement Category
Services
Procurement Method
Not Specified
Procurement Method Details
Tender Suitability
Not specified
Awardee Scale
Not specified

Common Procurement Vocabulary (CPV)

CPV Divisions

45 - Construction work

CPV Codes

45221247 - Tunnelling works

Notice Value(s)

Tender Value
£500,000 £500K-£1M
Lots Value
Not specified
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
12 Aug 20262 weeks ago
Submission Deadline
14 Aug 2026Expired
Future Notice Date
Not specified
Award Date
Not specified
Contract Period
3 Mar 2027 - 3 Dec 2034 Over 5 years
Recurrence
Not specified

Notice Status

Tender Status
Active
Lots Status
Not Specified
Awards Status
Not Specified
Contracts Status
Not Specified

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
Sizewell C Limited
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
LONDON
Postcode
W1T 4EZ
Postcode Area
West London
Country
England
Major Region (ITL 1)
TLI London
Basic Region (ITL 2)
TLI3 Inner London - West
Small Region (ITL 3)
TLI36 Camden
Delivery Location
Not specified
Local Authority
Camden
Electoral Ward
Bloomsbury
Westminster Constituency
Holborn and St Pancras

Further Information

Notice Documents

Open Contracting Data Standard (OCDS)

View full OCDS Record for this contracting process

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The Open Contracting Data Standard (OCDS) is a framework designed to increase transparency and access to public procurement data in the public sector. It is widely used by governments and organisations worldwide to report on procurement processes and contracts.

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