---
title: "National Grid Substation Construction"
ocid: "ocds-h6vhtk-0657bc"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0657bc"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-0657bc.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-0657bc.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "NATIONAL GRID UK LIMITED"
published: "2026-06-16"
---

# National Grid Substation Construction

Buyer: NATIONAL GRID UK LIMITED  
Current stage: Award  
OCID: ocds-h6vhtk-0657bc

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## Summary

The procurement process initiated by NATIONAL GRID UK LIMITED involves the construction of substations, with a focus on mechanical and electrical installations, as well as major civil works. This opportunity is classified under the industry category of 'works' and is organised under a dynamic market framework with the procurement method being open. The main activities span across the United Kingdom, encompassing regions such as London, Leeds, Glasgow, and Newcastle Upon Tyne, among others. This endeavour has reached the Award stage, with key parties including large and SME suppliers such as AMALGAMATED CONSTRUCTION LTD, COSTAIN LIMITED, and GLOBAL SUBSTATION SOLUTIONS LIMITED. Modifications to this market were published on 16th June 2026, following its establishment on 21st April 2026.

This tender presents significant opportunities for business growth, particularly for companies specialising in high-voltage infrastructure projects. Large construction firms and skilled SMEs with capabilities in substation construction, programme management, and installation of electrical distribution apparatus will find suitable opportunities to compete effectively. Businesses that can offer expertise in managing complex, high-value projects, and those situated within or capable of operating in the targeted UK regions, are well-suited to respond to this procurement opportunity. Additionally, participating companies may benefit from long-term engagement due to the ongoing nature of the dynamic purchasing system and framework agreements linked to the National Grid group, ensuring consistent business development across various related domains.

## Notice

This QUDM is for substation construction, mechanical and electrical installation and major civil works. To effectively and efficiently deliver the capital works required to meet our Electricity License obligations, manage the risk on our electricity transmission network and to connect new customers,

### Lot Information

EPC Substation Construction

Scope for Lot 1: EPC Substation Construction Suppliers in lot 1 shall compete for stand-alone contracts and/or frameworks and shall be responsible for delivering capabilities from the following illustrative list, specific to working within a live high-voltage (up to 400kV) transmission network substation environment: * Detailed electrical and civil design * Construction Design Management (CDM) * Programme management * Project management * Site management, including acting as Principal Contractor under the CDM Regulations * Procurement and supply chain management * Subcontractor management * Civil engineering * Protection and control systems installation, configuration and commissioning * Mechanical and electrical installation, testing and commissioning An illustrative list of work types included within this lot is as follows (this list is subject to change due to changing or emerging requirements throughout the QUDM period) * New Build AIS/GIS * AIS/GIS Substation Extension * Major AIS/GIS Substation Asset Replacement Operators that are successful in securing a position on lot 1 of the QUDM may be required to procure products that are to be selected from a list of suppliers that has been pre-approved by National Grid, to accept free-issue equipment and services supplied from contracts that National Grid has placed, or to accept the novation of such a contract after it has been placed by National Grid, for example: * Power transformers * Protection and Control * Gas Insulated Switchgear (GIS) * Air Insulated Switchgear (AIS) * Consumables This lot is designed for larger, more complex works requiring a traditional full EPC turnkey approach to delivery of the scope, with typical project estimates being >PS20million.

Mechanical & Electrical Installations

Scope for Lot 2: Mechanical & Electrical Installation Suppliers in lot 2 shall compete for stand-alone contracts and shall be responsible for delivering capabilities from the following illustrative list, specific to working within a live high-voltage (132kV~400kV) transmission network substation environment: * Detailed engineering and civil design, including primary and protection and control design * Construction Design Management (CDM) * Programme management * Project management * Site management, including acting as Principal Contractor under the CDM Regulations and temporary works management * Procurement and supply chain management * Subcontractor management * Civil engineering * Protection and control systems installation, configuration and commissioning An illustrative list of work types included within this lot is as follows (this list is subject to change due to changing or emerging requirements throughout the QUDM period) * Substation Upgrades / Smaller Extensions * AIS/GIS Substation Extensions * AIS/GIS Substation Asset Replacement Operators that are successful in securing a position on lot 2 of the QUDM may be required to procure products that are to be selected from a list of suppliers that has been pre-approved by National Grid , to accept free-issue equipment and services supplied from contracts that National Grid has placed, or to accept the novation of such a contract after it has been placed by National Grid, for example: * Power transformers * Protection and Control * Gas Insulated Switchgear (GIS) * Air Insulated Switchgear (AIS) * Consumables This Lot is designed for relatively smaller and less complex works than Lot 1 whereby a competent installer or medium sized construction supplier would have the ability to deliver the scope of work, and typical project estimates would be less than

Major Civils (>PS5m)

Scope for Lot 3: Major Civil Suppliers in lot 3 shall compete for stand-alone contracts and/or frameworks and shall be responsible for delivering capabilities from the following illustrative list for Substation major civil works with typical project estimated greater than >PS5million. Scope shall include but is not limited to, the following illustrative types of works: * Project & Programme Management: * Ensure sufficient and competent resources are deployed on the project to deliver the project in accordance with all National Grid standards and specifications. * Liaison with and management of the interface with any affected landowner, statutory body or undertaker during the delivery of the works (e.g., Local Highways Authority, Network Rail, Environment Agency, Distribution Network Operators). * Consultation & Engagement: * Support the Client in the development of consultation materials as required * Attend and present at consultation events and support the preparation of consultation responses * Support the Client at any technical stakeholder meetings * Input into Consultation Report, liaise with Consents Integrator and engage with consultees as required * Coordinate with Lands Team for survey access * Assist with S172 evidence compilation and other requirements. * Surveys: * Planning, management, delivery and reporting of all surveys required to support the project at all stages of its lifecycle, including: * Site walkover surveys to verify desktop work * Borehole surveys * Perform soil surveys * Intrusive surveys (e.g., foundation inspections). * Existing asset surveys. * Earthing surveys. * Utility surveys * Traffic surveys including vehicle volume and speed surveys. * Design: * Development of outline design, associated drawings and technical reporting required for inclusion within the planning and/or consent application and the construction works information * Production of design, which is in accordance with the Client's requirements, eliminates hazards as far as reasonably practicable for the whole life of the assets, facilitates a safe and efficient construction phase and gives due regard to Client's environmental and sustainability requirements. * Support the Client at any technical stakeholder meetings * Enact the role of Principal Designer in accordance with the CDM regulations 2015 for the development and/or delivery phase and formerly appoint the Principal Designer Representative as required * Review the System Design Specification for completeness and identify any gaps * Review any design works prior to engagement to understand any limitations and restrictions to be carried forward into the subsequent design stage, * Discharge relevant conditions associated with any approved planning permission and/or consent to ensure these are factored into the detailed design * Proactively engage and share design information with other design disciplines involved in the project(s) to ensure that all requirements are considered such that a robust, holistic design can be achieved. * Effectively manage design change ensuring that appropriate communication channels are maintained and document/drawing version control well established. * Responsible with others at the point of known design interfaces (i.e., HV Substation, HV OHL, HV Cables, etc.) and/or with other parties (i.e., Bulk Purchase Equipment (static wound equipment), Generators, DNO, etc.) to ensure that their project design is the most cost-effective solution which does not compromise any other party's programme and objectives in compliance with the duties and responsibilities identified by current CDM Regulations. * Design management and coordination to reduce interface risk. * Building Permanent Structures: The design and construction of new permanent buildings including but not limited to: * Switch Halls for Gas Insulated Switchgear and other equipment contained therein. * Ancillary Plant Room Buildings. * Office & Amenities Blocks. * Storage and Workshop Units * Building Services: Building services required for any new build or refurbishment work (e.g., heating / cooling, ventilation, plumbing and sanitation). * Cable Jointing: * Provision of jointing resources for cable system installation using client-issued materials. * Jointing resources and equipment for non-client-issued jointing tasks. * Temporary works design for jointing techniques. * Cable Pulling: Delivery of all required cable pulling installations including supply (as required) access, cable trenches, duct installation, jointing, testing, backfilling and cable installation elements. * Cable Removal: Removal of existing buried HV cable equipment and any associated above ground equipment such as terminations, oil tanks or kiosks including their foundations * Enabling Works: Pre-construction activities required before commencing the construction of main works including highway and service diversions, ground preparation and remediation, flood mitigation works, demolition of structures, soil stripping and removal, bridge construction, obtaining (including submission and payments of fees) of relevant permits and licences and environmental mitigation works. * Foundations & Structures: Design and supply of civil works for overhead line, underground cables, substation or other required works and structures including ground preparation; excavation and disposal of or stock piling for re-use of arisings; creating safe working platforms for piling rigs; installation of any piling and construction of pile caps; supply and installation of all form work, reinforcement, and concrete. * Flood Defence Design & Build: The design and build of flood defences to reduce the risk of flooding to new and existing infrastructure including hydraulic modelling, flood risk assessment, detailed design, drainage, flood defence walls, floodgates, pumping stations. * Haul Roads and Access Roads: * Design and build of permanent drainage, roadworks and surfacing to satisfy highway specifications. * Traffic management. * Temporary construction haul roads and drainage. * Landscaping: * Delivery of all landscaping requirements including stockpiling and management of construction spoil/arisings; Supply and spreading of appropriate materials where insufficient area is generated from the construction activities; bulk muck shift and creation of screen mounding; tree planting and maintenance and Pond or other habitat creation. * Maintenance for agreed period of time within the planning permission and/or consent specification or as agreed with the relevant stakeholder and/or in line with Biodiversity Net Gain obligations. * Site Establishment: Establishment of construction welfare compounds for the delivery of the whole or parts of the project including supply and installation of site welfare facilities, fencing and site security, temporary connections for water, drainage, and electricity, and removal of site establishment upon project completion with reinstatement of disturbed ground. * Site Management * Enact the role of Principal Contractor in line with the requirements of the CDM regulations. * Deliver the works in accordance with all National Grid Management of Works procedures. * Proactively manage, in line with industry best practise, all aspects of the works in terms of safety, quality, security and environmental compliance. * Liaise with all affected Landowners/Grantors affected by the works. * Liaise with Client site staff including operational and project delivery teams. * Ensure that all site records are maintained, and that site document control is properly managed. * Site Security: * Provision of all requirements to maintain a safe and secure site in line with National Grid policies and procedures. * Construction and installation of permanent security fencing and associated works * Temporary Works: Design, management and provision of all temporary works required for the delivery of the scope

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/056734-2026 |
| Notice type | UK15 - Dynamic Market Modification Notice |
| Procurement type | Dynamic |
| Procurement category | Works |
| Procurement method | Open |
| Procurement method details | Dynamic market |
| Tender suitability | Not specified |
| Awardee scale | Large, SME |
| All stages | Tender, Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 16 Jun 2026 |
| Submission deadline | Not specified |
| Future notice date | Not specified |
| Award date | 16 Jun 2026 |
| Contract period | Not specified |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Active |
| Lots status | Active |
| Awards status | Active |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | NATIONAL GRID UK LIMITED |
| Locality | LONDON |
| Post town | Central London |
| Postcode | WC2N 5EH |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI3 Inner London - West |
| ITL 3 | TLI35 Westminster and City of London |
| Local authority | Westminster |
| Electoral ward | St James's |
| Westminster constituency | Cities of London and Westminster |
| Delivery location | TLC North East (England), TLD North West (England), TLE Yorkshire and The Humber, TLF East Midlands (England), TLG West Midlands (England), TLH East (England), TLI London, TLJ South East (England), TLK South West (England), TLL Wales |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 16 |
| Supplier names | ALPHA CONSTRUCTION; AMALGAMATED CONSTRUCTION; BAM NUTTALL; COSTAIN; GALLIFORD TRY CONSTRUCTION; GLOBAL SUBSTATION SOLUTIONS; KIRBY GROUP ENGINEERING ULC; LAING O'ROURKE DELIVERY; MORSON PROJECTS; OCU UTILITY SERVICES; RJ MCLEOD (CONTRACTORS; SIEMENS ENERGY; SKANSKA CONSTRUCTION; TRANT ENGINEERING; TUDORBORNE; WINSHALL |

## CPV Codes

### Divisions

- 45 - Construction work

### Codes

- 45232220 - Substation construction work
- 45317200 - Electrical installation work of transformers
- 45317300 - Electrical installation work of electrical distribution apparatus

## Release History

- 16 Jun 2026 at 14:13 - Award - UK15 - Dynamic Market Modification Notice - https://www.find-tender.service.gov.uk/Notice/056734-2026
- 21 Apr 2026 at 14:17 - Award - UK14 - Dynamic Market Establishment Notice - https://www.find-tender.service.gov.uk/Notice/036204-2026
- 19 Feb 2026 at 09:55 - Tender - UK13 - Dynamic Market Intention Notice - https://www.find-tender.service.gov.uk/Notice/015074-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/056734-2026
  16th June 2026 - Dynamic market modification notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/036204-2026
  21st April 2026 - Dynamic market establishment notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/015074-2026
  19th February 2026 - Dynamic market intention notice on Find a Tender
- https://forms.office.com/Pages/ResponsePage.aspx?id=U2qK-fMlEkKQHMd4f800lR6N7XkEjipHol2q4gB3asNUOFpWWFY4RUtRTTROMzQ5Nk1QVjhSQVBGTy4u
  Registration form for National Grid eSourcing platform Please complete details to begin registration process

## Notice URLs

- http://www.alphaconstruction.co.uk
- http://www.amcogiffen.co.uk
- http://www.costain.com/
- http://www.gallifordtry.co.uk
- http://www.gss.eu.com
- http://www.kirbygroup.com
- http://www.laingorourke.com
- http://www.morson-projects.co.uk
- http://www.neary.co.uk
- http://www.siemens-energy.com
- http://www.trant.co.uk
- http://www.winshall.co.uk
- https://forms.office.com/Pages/ResponsePage.aspx?id=U2qK-fMlEkKQHMd4f800lR6N7XkEjipHol2q4gB3asNUOFpWWFY4RUtRTTROMzQ5Nk1QVjhSQVBGTy4uLinkforregistrationformforNationalGrideSourcingsystemPleasecompletetheformandselectcorrectDynamicMarkettoreceivefurtherregistrationdetails.
- https://ocugroup.com/
- https://www.bam.co.uk
- https://www.legislation.gov.uk/ukpga/2023/54/contents
- https://www.skanska.co.uk/

## 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-h6vhtk-0657bc. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-0657bc.json.