--- title: "P4 Transformers, Switches and Sockets - HRS02 Tunnel and Lineside M&E" ocid: "ocds-b5fd17-ed66ab91-d699-49d1-b76e-c4fc28c59536" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-ed66ab91-d699-49d1-b76e-c4fc28c59536" markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-ed66ab91-d699-49d1-b76e-c4fc28c59536.md" json_url: "https://d3tenders.com/contract/ocds-b5fd17-ed66ab91-d699-49d1-b76e-c4fc28c59536.json" source: "Contracts Finder" current_stage: "Tender" buyer: "COSTAIN GROUP PLC" published: "2025-10-02" --- # P4 Transformers, Switches and Sockets - HRS02 Tunnel and Lineside M&E Buyer: COSTAIN GROUP PLC Current stage: Tender OCID: ocds-b5fd17-ed66ab91-d699-49d1-b76e-c4fc28c59536 [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-b5fd17-ed66ab91-d699-49d1-b76e-c4fc28c59536) [Download OCDS JSON](https://d3tenders.com/contract/ocds-b5fd17-ed66ab91-d699-49d1-b76e-c4fc28c59536.json) ## Summary The procurement process initiated by Costain Group PLC involves the supply of transformers, switches, and sockets for the HS2 high-speed railway project connecting London to Birmingham. The tender, titled "P4 Transformers, Switches and Sockets - HRS02 Tunnel and Lineside M&E", falls under the industry category of electric motors, generators, and transformers (CPV: 31100000). The procurement stage is currently at the tender phase, with all interested parties required to submit their expressions of interest by 14th October 2025. The goods are to be delivered across regions in the West Midlands, London, and the South East of the United Kingdom. The procurement method is not specifically detailed, but the tender has an estimated value ranging from £5,000,000 to £10,000,000. This tender represents a significant opportunity for businesses specialising in transformers and electrical infrastructure to engage with a major infrastructure project like HS2. Small and medium-sized enterprises (SMEs) are encouraged to participate, provided they possess the capability to manage the scale of work required. The procurement presents a chance for companies that can deliver innovative, cost-effective, and efficient electrical solutions, particularly those that can enhance health and safety, programme efficiency, cost management, quality assurance, and carbon efficiency. The timeline for contract execution spans from 31st May 2027 to 30th April 2028, offering substantial business growth potential for successful suppliers. ## Notice Scope/ What Will Be Required Costain have been appointed to deliver contract HRS02, the Tunnel and Lineside Mechanical and Electrical services for HS2 ltd. A high-speed railway project that connects London to Birmingham with plans to extend in the future. Package 4 the transformers, switches and sockets scope associated to contract HRS02 consists of supply of transformers, switches and sockets for the tunnel and open route sections of the railway, the route being circa 180 km in length, inclusive of; -Sockets and Transformers 110v - 230v -Sockets and Transformers 400v - 690v -Maintenance Transformers -ATS Isolators -ATS Isolator Switches -Auto Transformer Switches -Isolation Transformers Costain require a supplier for supply only of the Transformers, Switches and Sockets package. Costain and HS2 are looking for innovative and smart solutions that provide benefits in the following key areas; -Health & Safety -Programme - Installation and commissioning efficiency -Cost -Quality and Assurance efficiency -Whole life cost -Carbon efficiency The scope of supply will include the following; -Supply of Sockets and Transformers -Supply of Isolators -Supply of Auto Transformer Switches -Provision of samples and mock ups Full details of the scope and specifications will be provided to the successfully shortlisted suppliers. Suppliers should be aware of the scale of the HS2 project and are to assess their internal capabilities to be able to carry out the intended scope of works prior to completing the expression of interest. ## Key Details | Field | Value | | --- | --- | | Publication source | Contracts Finder | | Latest notice | https://www.contractsfinder.service.gov.uk/Notice/2e6c3571-d774-45f1-87fb-c2b7dd28d7b0 | | Notice type | Tender Notice | | Procurement type | Standard | | Procurement category | Goods | | Procurement method | Not Specified | | Procurement method details | Not specified | | Tender suitability | SME | | Awardee scale | Not specified | | All stages | Tender | ## Dates | Field | Value | | --- | --- | | Publication date | 2 Oct 2025 | | Submission deadline | 14 Oct 2025 | | Future notice date | Not specified | | Award date | Not specified | | Contract period | 30 May 2027 - 30 Apr 2028 | | Recurrence | Not specified | ## Values | Field | Value | | --- | --- | | Tender value | £10,000,000 | | 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 | COSTAIN GROUP PLC | | Locality | LONDON | | Post town | Central London | | Postcode | EC3A 8BE | | Country | England | | ITL 1 | TLI London | | ITL 2 | TLI3 Inner London - West | | ITL 3 | TLI35 Westminster and City of London | | Local authority | City of London | | Electoral ward | Aldgate | | Westminster constituency | Cities of London and Westminster | | Delivery location | TLG West Midlands (England), TLI London, TLJ South East (England) | ## CPV Codes ### Divisions - 31 - Electrical machinery, apparatus, equipment and consumables; lighting ### Codes - 31100000 - Electric motors, generators and transformers - 31214100 - Switches ## Release History - 2 Oct 2025 at 08:10 - Tender - Tender Notice - https://www.contractsfinder.service.gov.uk/Notice/2e6c3571-d774-45f1-87fb-c2b7dd28d7b0 ## Documents - https://www.contractsfinder.service.gov.uk/Notice/2e6c3571-d774-45f1-87fb-c2b7dd28d7b0 2nd October 2025 - Opportunity notice on Contracts Finder - https://www.competefor.com/business/viewOpportunityDetailsSupplier.html?id=100286952 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-ed66ab91-d699-49d1-b76e-c4fc28c59536. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-ed66ab91-d699-49d1-b76e-c4fc28c59536.json.