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National Grid Substation Construction

NATIONAL GRID UK LIMITED

This public procurement record has 4 releases in its history.

Award

04 Aug 2026 at 10:08

UK15 - Dynamic Market Modification Notice
Award

16 Jun 2026 at 15:13

UK15 - Dynamic Market Modification Notice
Award

21 Apr 2026 at 15:17

UK14 - Dynamic Market Establishment Notice
Tender

19 Feb 2026 at 09:55

UK13 - Dynamic Market Intention Notice
Summary of the contracting process

National Grid UK Limited established a dynamic market for substation construction and associated transmission-network works across England, Wales and Scotland. The requirement covers three areas: full EPC substation construction; mechanical and electrical installation; and major civil works. Activities include electrical and civil design, construction management, project and programme management, procurement, supply-chain and subcontractor management, civil engineering, protection and control systems, mechanical and electrical installation, testing and commissioning. The work is for live high-voltage substations, covering networks from 132kV to 400kV. Major civil works include buildings, foundations, cable installation and removal, access roads, drainage, flood defences, landscaping, enabling works, surveys, temporary works and site security. The arrangement can be used by National Grid group entities.

The process has reached the awarded stage: active awards were made for all three lots. Lot 1, EPC Substation Construction, was awarded to BAM Nuttall, Costain, Laing O’Rourke Delivery, Skanska Construction and Siemens Energy; typical project estimates exceed £20 million. Lot 2, Mechanical & Electrical Installations, was awarded to Laing O’Rourke Delivery, Siemens Energy, Morson Projects, OCU Utility Services, Kirby Group Engineering, Amalgamated Construction, Costain, Global Substation Solutions, Winshall and M Group Energy. Lot 3, Major Civils, was awarded to BAM Nuttall, Costain, Laing O’Rourke Delivery, Skanska Construction, Trant Engineering, TudorBorne, Alpha Construction, Galliford Try, Amalgamated Construction, RJ McLeod and M Group Energy; typical projects exceed £5 million. This is an open procurement using a dynamic market, with electronic submission allowed and no submission fee. The dynamic market began on 15 April 2026 and has no stated end date. Participation is limited to members.

This award indicates sustained demand from National Grid for contractors able to deliver complex electricity-transmission infrastructure in live high-voltage environments. Credible competitors would need strong design, construction and project-management capability, with competent resources for principal-contractor or principal-designer duties under the CDM Regulations. Relevant delivery strength includes substation EPC, mechanical and electrical installation, protection and control systems, testing and commissioning, major civil engineering, cable works, foundations, buildings, roads, drainage, flood protection and environmental mitigation. Suppliers should be able to manage procurement, approved or client-supplied equipment, subcontractors, interfaces with landowners and statutory bodies, and stringent safety, quality, security and environmental requirements. The awards show that both major infrastructure businesses and specialist SMEs have been accepted, including firms with substation, utility, engineering and civil-construction expertise.

How relevant is this notice?

Notice Information

Notice Title

National Grid Substation Construction

Notice Description

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

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-0657bc
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/073495-2026
Current Stage
Award
All Stages
Tender, Award

Procurement Classification

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

Common Procurement Vocabulary (CPV)

CPV Divisions

45 - Construction work

CPV Codes

45232220 - Substation construction work

45317200 - Electrical installation work of transformers

45317300 - Electrical installation work of electrical distribution apparatus

Notice Value(s)

Tender Value
Not specified
Lots Value
Not specified
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
4 Aug 20263 weeks ago
Submission Deadline
Not specified
Future Notice Date
Not specified
Award Date
4 Aug 20263 weeks ago
Contract Period
Not specified - Not specified
Recurrence
Not specified

Notice Status

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

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
NATIONAL GRID UK 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
WC2N 5EH
Postcode Area
Central London
Country
England
Major Region (ITL 1)
TLI London
Basic Region (ITL 2)
TLI3 Inner London - West
Small Region (ITL 3)
TLI35 Westminster and City of London
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
Local Authority
Westminster
Electoral Ward
St James's
Westminster Constituency
Cities of London and Westminster

Supplier Information

Number of Suppliers
17
Supplier Names

ALPHA CONSTRUCTION LIMITED

AMALGAMATED CONSTRUCTION LTD

BAM NUTTALL LIMITED

COSTAIN LIMITED

GALLIFORD TRY CONSTRUCTION LIMITED

GLOBAL SUBSTATION SOLUTIONS LIMITED

Kirby Group Engineering ULC

LAING O'ROURKE DELIVERY LIMITED

M GROUP ENERGY (NETWORK INFRASTRUCTURE) LIMITED

MORSON PROJECTS LIMITED

OCU UTILITY SERVICES LIMITED

RJ McLeod (Contractors) Ltd

SIEMENS ENERGY LIMITED

SKANSKA CONSTRUCTION UK LIMITED

TRANT ENGINEERING LIMITED

TUDORBORNE LIMITED

WINSHALL LTD

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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