--- title: "Tunnel Segment Production Monitoring System" ocid: "ocds-b5fd17-4c8ac5ca-44e3-478f-a326-edfd6d712bdd" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-4c8ac5ca-44e3-478f-a326-edfd6d712bdd" markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-4c8ac5ca-44e3-478f-a326-edfd6d712bdd.md" json_url: "https://d3tenders.com/contract/ocds-b5fd17-4c8ac5ca-44e3-478f-a326-edfd6d712bdd.json" source: "Contracts Finder" current_stage: "Tender" buyer: "Sizewell C Limited" published: "2026-08-12" --- # Tunnel Segment Production Monitoring System Buyer: Sizewell C Limited Current stage: Tender OCID: ocds-b5fd17-4c8ac5ca-44e3-478f-a326-edfd6d712bdd [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-b5fd17-4c8ac5ca-44e3-478f-a326-edfd6d712bdd) [Download OCDS JSON](https://d3tenders.com/contract/ocds-b5fd17-4c8ac5ca-44e3-478f-a326-edfd6d712bdd.json) ## Summary 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. ## Notice 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. ## Key Details | Field | Value | | --- | --- | | Publication source | Contracts Finder | | Latest notice | https://www.contractsfinder.service.gov.uk/Notice/37f4cf48-bafe-44cc-8c14-f89d74cc0bd8 | | Notice type | Tender Notice | | Procurement type | Standard | | Procurement category | Services | | Procurement method | Not Specified | | Procurement method details | Not specified | | Tender suitability | Not specified | | Awardee scale | Not specified | | All stages | Tender | ## Dates | Field | Value | | --- | --- | | Publication date | 12 Aug 2026 | | Submission deadline | 14 Aug 2026 | | Future notice date | Not specified | | Award date | Not specified | | Contract period | 3 Mar 2027 - 3 Dec 2034 | | Recurrence | Not specified | ## Values | Field | Value | | --- | --- | | Tender value | £500,000 | | Lots value | Not specified | | Awards value | Not specified | | Contracts value | Not specified | ## Status | Field | Value | | --- | --- | | Tender status | Active | | Lots status | Not specified | | Awards status | Not specified | | Contracts status | Not specified | ## Buyer | Field | Value | | --- | --- | | Main buyer | Sizewell C Limited | | Locality | LONDON | | Postcode area | West London | | Postcode | W1T 4EZ | | Country | England | | ITL 1 | TLI London | | ITL 2 | TLI3 Inner London - West | | ITL 3 | TLI36 Camden | | Local authority | Camden | | Electoral ward | Bloomsbury | | Westminster constituency | Holborn and St Pancras | | Delivery location | Not specified | ## CPV Codes ### Divisions - 45 - Construction work ### Codes - 45221247 - Tunnelling works ## Release History - 12 Aug 2026 at 14:10 - Tender - Tender Notice - https://www.contractsfinder.service.gov.uk/Notice/37f4cf48-bafe-44cc-8c14-f89d74cc0bd8 ## Documents - https://www.contractsfinder.service.gov.uk/Notice/37f4cf48-bafe-44cc-8c14-f89d74cc0bd8 12th August 2026 - Opportunity notice on Contracts Finder - https://www.competefor.co.uk/business/viewOpportunityDetailsSupplier.html?id=117106796 Please follow this link to view the notice. ## Provenance This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-b5fd17-4c8ac5ca-44e3-478f-a326-edfd6d712bdd. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-4c8ac5ca-44e3-478f-a326-edfd6d712bdd.json.