--- title: "Tunnel Segment Production Monitoring System copy" ocid: "ocds-b5fd17-e86010e9-31cb-4390-97d2-24719474ed92" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-e86010e9-31cb-4390-97d2-24719474ed92" markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-e86010e9-31cb-4390-97d2-24719474ed92.md" json_url: "https://d3tenders.com/contract/ocds-b5fd17-e86010e9-31cb-4390-97d2-24719474ed92.json" source: "Contracts Finder" current_stage: "Tender" buyer: "Sizewell C Limited" published: "2026-08-17" --- # Tunnel Segment Production Monitoring System copy Buyer: Sizewell C Limited Current stage: Tender OCID: ocds-b5fd17-e86010e9-31cb-4390-97d2-24719474ed92 [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-b5fd17-e86010e9-31cb-4390-97d2-24719474ed92) [Download OCDS JSON](https://d3tenders.com/contract/ocds-b5fd17-e86010e9-31cb-4390-97d2-24719474ed92.json) ## Summary Sizewell C Limited is seeking a services supplier to provide an end-to-end monitoring and traceability system for approximately 39,000 precast concrete tunnel segments. The requirement covers tracking each segment from casting at the Avonmouth tunnel precast factory through transport using road and rail interfaces, storage at four facilities, and installation by three tunnel boring machines. The system is intended to provide supply-chain visibility, improve reporting and quality traceability, resolve inventory discrepancies, prevent duplicate segments and installation errors, and support quality compliance. The segments will serve two intake tunnels and one outfall tunnel. Delivery spans London, the South West and the South East of England. The procurement is categorised as tunnelling works, although the main requirement is for services. The procurement reached the tender stage, at which Sizewell C Limited invited suppliers to submit offers. The tender deadline set by the buyer was 21 August 2026 at 17:00 BST. The planned contract period runs from 3 March 2027 to 3 December 2034. The estimated value is between £250,000 and £500,000, in GBP. The published classification is CPV 45221247, tunnelling works. The requirement is presented as a single procurement rather than separate lots. It is not identified as suitable for small or medium-sized enterprises or voluntary, community and social enterprises. The opportunity concerns a long-term service supporting the production, logistics, storage and installation lifecycle of tunnel segments. This opportunity suits suppliers that can design, configure and support industrial asset-tracking or supply-chain traceability systems in complex infrastructure environments. Relevant capability includes real-time or near-real-time tracking across manufacturing, road and rail logistics, multiple storage locations and installation by tunnel boring machines. Suppliers should be able to integrate operational data from production, inventory, transport, storage and installation activities, while providing reliable reporting, audit trails and quality records for multiple stakeholders. Experience in construction, tunnelling, precast concrete, major infrastructure or similarly controlled manufacturing and logistics operations would be valuable. The scale and extended delivery period favour an established provider with sufficient implementation, systems-integration, technical-support and project-management capacity for an end-to-end service. ## 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/8487f9cc-06bc-476d-9212-9dfd09693e47 | | 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 | 17 Aug 2026 | | Submission deadline | 21 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 | TLI London, TLJ South East (England), TLK South West (England) | ## CPV Codes ### Divisions - 45 - Construction work ### Codes - 45221247 - Tunnelling works ## Release History - 17 Aug 2026 at 15:00 - Tender - Tender Notice - https://www.contractsfinder.service.gov.uk/Notice/8487f9cc-06bc-476d-9212-9dfd09693e47 ## Documents - https://www.contractsfinder.service.gov.uk/Notice/8487f9cc-06bc-476d-9212-9dfd09693e47 17th August 2026 - Opportunity notice on Contracts Finder - https://www.competefor.co.uk/business/viewOpportunityDetailsSupplier.html?id=117808137 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-e86010e9-31cb-4390-97d2-24719474ed92. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-e86010e9-31cb-4390-97d2-24719474ed92.json.