---
title: "102203 Mill Hill Tertiary Connection & SGT Replacement"
ocid: "ocds-h6vhtk-065bf1"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-065bf1"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-065bf1.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-065bf1.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "NATIONAL GRID ELECTRICITY TRANSMISSION PLC"
published: "2026-02-25"
---

# 102203 Mill Hill Tertiary Connection & SGT Replacement

Buyer: NATIONAL GRID ELECTRICITY TRANSMISSION PLC  
Current stage: Award  
OCID: ocds-h6vhtk-065bf1

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## Summary

The procurement process for the "102203 Mill Hill Tertiary Connection & SGT Replacement" project, managed by NATIONAL GRID ELECTRICITY TRANSMISSION PLC, a private utility located in London, has reached the award stage. This award was necessitated urgently due to the administration of a previous contractor, and aims to deliver essential infrastructure works at Mill Hill Substation. The procurement method chosen was direct award to BAM NUTTALL LIMITED. The contract activities will span from 25 February 2026 to 6 May 2027. This construction work falls under the industry category of substation construction, which is critical for upgrading the UK's electricity transmission network and supporting clean energy initiatives. The tender addresses regions across the United Kingdom including UKC, UKD, UKE, UKF, UKG, UKH, UKI, UKJ, and UKK.

This procurement presents significant opportunities for businesses in the construction and utilities sectors, particularly those specialising in large-scale infrastructure projects. The immediate appointment of BAM NUTTALL LIMITED for the Mill Hill Substation work underscores the urgency and importance of swift grid enhancements. Companies equipped to undertake substantial, technically complex projects that support the national transition to cleaner energy and infrastructure development are highly compatible with such tenders. Moreover, firms with capabilities in managing utility projects amid pressing timelines may find favourable growth by participating in similar opportunities initiated by major entities like National Grid.

## Notice

This contract relates to the delivery of works and related services at Mill Hill Substation (the "Works"). The Works were previously allocated to Gunning Transmission & Distribution Services Limited - in Administration ("GTDS"). GTDS went into administration on Friday 16 January 2026 and is unable to progress or complete delivery of the Works. As a consequence, National Grid has had to move at significant pace to appoint a replacement contractor for the Works, to progress critical path activities, maintain (as far as practicable) the programme for the works, and satisfy regulatory, customer and other commitments. The Works contribute to the ongoing expansion of the electricity transmission network, delivering essential upgrades to the grid to support the UK's move away from fossil fuels and increased clean energy generation. Various other projects are also being re-allocated to other contractors for similar reasons, while the delivery of further works (previously allocated to GTDS) is being supported by National Grid's existing framework contractors

### Procurement Information

The Works are strictly necessary to continue the delivery of nationally significant infrastructure upgrades as part of the ongoing enhancement of the grid. By bringing on the replacement contractor almost immediately through this direct award, National Grid is seeking to minimise and mitigate the delay to the Works arising from the administration of GTDS and maintain continuity of the supply chain and otherwise secure continuity on site. National Grid intends to have the contract in place before the end of January 2026, so within 2 weeks of GTDS' administration. While some earlier contingency planning was possible, National Grid could not reasonably have commenced a competitive tendering procedure before GTDS' administration was confirmed and there is no time to run such a procedure between the date of administration and the required into-contract date. The urgency is unavoidable as it is attributable solely to the administration of GTDS which could not have been foreseen when the Works were allocated to GTDS and was not confirmed until 16 January. National Grid has explored other alternatives to this direct award, including the use of its existing frameworks and allocation through its construction dynamic purchasing system, but no other route was found to be suitable in the circumstances

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/016889-2026 |
| Notice type | UK6 - Contract Award Notice |
| Procurement type | Standard |
| Procurement category | Works |
| Procurement method | Direct |
| Procurement method details | Direct award |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 25 Feb 2026 |
| Submission deadline | Not specified |
| Future notice date | Not specified |
| Award date | 25 Feb 2025 |
| Contract period | 25 Feb 2026 - 6 May 2027 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | £5,500,000 |
| Contracts value | Not specified |

## Status

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

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | NATIONAL GRID ELECTRICITY TRANSMISSION PLC |
| 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 | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | BAM NUTTALL |

## CPV Codes

### Divisions

- 45 - Construction work

### Codes

- 45232220 - Substation construction work

## Release History

- 25 Feb 2026 at 13:16 - Award - UK6 - Contract Award Notice - https://www.find-tender.service.gov.uk/Notice/016889-2026
- 25 Feb 2026 at 12:17 - Award - UK5 - Transparency Notice - https://www.find-tender.service.gov.uk/Notice/016853-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/016889-2026
  25th February 2026 - Contract award notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/016853-2026
  25th February 2026 - Transparency notice on Find a Tender

## Notice URLs

- https://www.bamnuttall.co.uk/
- https://www.legislation.gov.uk/ukpga/2023/54/contents

## 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-065bf1. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-065bf1.json.