Find a Tender
complete
Official procurement procedure
102203 Mill Hill Tertiary Connection & SGT Replacement
No classification published
Location not published
Published value
Not published
Submission deadline Not published
Lots published1
Procurement Executive Summary
AI & Search Synopsis
Generated from official OCDS record
Tenderline Synopsis: NATIONAL GRID ELECTRICITY TRANSMISSION PLC: "102203 Mill Hill Tertiary Connection & SGT Replacement". Published status: complete. Published value: Value not published. 1 published lot. Submission deadline not published. See the official notice for participation instructions.
| Contracting Authority | NATIONAL GRID ELECTRICITY TRANSMISSION PLC | Scope & Categories | Not published | Submission Window | complete No deadline published |
|---|---|---|---|---|---|
| Submission Gateway | Direct notice route | Legal Basis & Regime | Standard procurement | Estimated Value (exc. VAT) | Not published |
Bidder Intelligence · Authority Profile: NATIONAL GRID ELECTRICITY TRANSMISSION PLC
Market Analytics
Derived from OCDS awards & bid statistics
Published history for NATIONAL GRID ELECTRICITY TRANSMISSION PLC. These figures describe retained records, not a forecast of bids or a measure of buyer bias.
Average Price Reduction
Not availableInsufficient comparable data
Competition Density
6.5Bids / Report
Supplier ConcentrationModerate Concentration
SEESAI LIMITEDTop vendor: 42.7% of attributable valuePayment Terms
Check noticePublished terms
Coverage: 14 active published awards; 2 bid reports (which may be per lot). Supplier values exclude multi-supplier awards, frameworks and DPS, and use GBP only. They are published award values, not payments. Price reduction compares single-lot, single-award, single-supplier GBP procedures with explicitly non-framework/non-DPS status; increases remain in the average. Unpublished data stays unknown. Awarded suppliers are winners, not all bidders.
Historical Awarded Suppliers With This Authority:
| Supplier Name | Historic Awards | Attributable GBP Value |
|---|---|---|
| SEESAI LIMITED | 1 win | £22,950,000 |
| BAM NUTTALL LIMITED | 2 wins | £10,200,000 |
| COSTAIN LIMITED | 1 win | £9,500,000 |
| OCU UTILITY SERVICES LIMITED | 1 win | £6,000,000 |
| Winshall Limited | 1 win | £5,127,099 |
Procedure terms
Contracting AuthorityNATIONAL GRID ELECTRICITY TRANSMISSION PLC | Procedure methodNot published | Procurement categoryNot published |
Statuscomplete | Framework / DPSNot published | CompetitionNot published |
Above thresholdNot published | Legal basisNot published | Tender period startsNot published |
Clarification deadlineNot published | Electronic submissionNot published | Submission languagesNot published |
Published25 Feb 2026, 13:16 GMT | Last source update25 Feb 2026, 13:16 GMT | Recurring procurementNot published |
ClassificationNot published | ||
Delivery areaLocation not published | ||
OCIDocds-h6vhtk-065bf1 | ||
What is being bought
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
What changed
From the official release history
- Official notice release published
25 Feb 2026, 13:16 GMT - Status changed to complete
25 Feb 2026, 12:17 GMT - Official notice release published
25 Feb 2026, 12:17 GMT - Buyer information updated
25 Feb 2026, 12:17 GMT
Lots and requirements (1)
Published by the contracting authority
- Lot 1 · #1Individual lot title not publishedcompletePublished valueNot publishedThe source published no individual title or description for this lot.Contract periodNot publishedEligibilityNot publishedOptions / renewalNot published
Timeline
- Procedure published
25 Feb 2026, 13:16 GMT - Award active
25 Feb 2025, 00:00 GMT · £5,500,000
Commercial outcome and competition
Awards BAM NUTTALL LIMITED £5,500,000 · 25 Feb 2025, 00:00 GMT · active |
ContractsNo contract published |
Bid statisticsNo aggregate bid statistics published |
Buyer and organisations in this procedure
NATIONAL GRID ELECTRICITY TRANSMISSION PLC
Contracting authority GB-COH-02366977Award and contract changes
Documents (0)
Official links; attachments are not copied
No linked documents are published
Related procedures (0)
No related procedures published
Planning and rationale
Planning budgetNot published |
No-engagement rationaleNot published |
Procedure rationaleThe 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 |