Official UK procurement notice
SF6 Leak Repair Framework
Authority: National Grid Electricity Transmission plc
What is being bought
Published requirement descriptionNational Grid Electricity Transmission (NGET) intends to establish a framework for the provision of Sulphur Hexafluoride (SF6) leak repair, leak reduction and preventative treatment services across its portfolio of Gas Insulated Switchgear (GIS) and Gas Insulated Busbar (GIB) assets located at transmission substations throughout Great Britain. The framework is intended to increase the delivery of SF6 emissions reduction activities through the use of standardised contracting arrangements and approved repair methodologies. Appointed contractors will be responsible for the design, installation, testing, inspection and quality assurance of external, non-intrusive repair solutions that maintain asset integrity and operational performance while reducing or preventing SF6 leakage. Solutions may include permanent repairs, leak-rate reduction treatments, and preventative interventions, and will typically be required to be installed without taking equipment out of service where reasonably practicable. Contractors will be expected to provide technically robust, evidence-based solutions, operate under ISO 9001-compliant quality management systems, and fulfil the roles of Principal Contractor and Principal Designer under the Construction (Design and Management) Regulations 2015. The framework will enable NGET to respond efficiently to emerging SF6 emission reduction requirements across its transmission network.
The anticipated term of the framework will be a 3-year initial term with 2 year extension options upon mutual agreement.
- The authority expects to re-tender this requirement around 18 May 2030, 23:59 BST.
CPV: Electricity distribution and related services · Installation services of electrical equipment · Mechanical and electrical engineering services · Repair and maintenance services of electrical and mechanical building installations · Repair and maintenance services of electrical distribution equipment
How this framework works
From the published notice- Type
- Closed framework
- Call-offs
- call-offs may be awarded directly or by further competition
- Places
- up to 6 suppliers
- Framework period
- 3 yrs · up to 5 yrs from 31 May 2027
The lotProcurement structure
single lot · value publishedLot #1PlannedRenewalPublished value£7,500,000
- Technical & professional ability
National reach
Comply with Construction (Design and Management) Regulations 2015
What it takes to wini
How this buyer will score bids.
The evaluation criteria and weights exactly as published on the notice, grouped by family (price, quality, social value and so on).
Evaluation split and conditions of participation as published; the tender pack may add morei
How this buyer will score bids.
The evaluation criteria and weights exactly as published on the notice, grouped by family (price, quality, social value and so on).
- Technical & professional ability
National reach
Comply with Construction (Design and Management) Regulations 2015
- “SF6 Leak Repair Framework” is a framework: the contest is a place on its panel, up to 6 suppliers, not a single contract: call-offs may be direct or by further competition.
Pipeline intelligence · planning stage: how this market runs before the tender is published
How National Grid Electricity Transmission plc buys Repair and maintenance services of machinery (CPV 5053), and who usually turns up
National Grid Electricity Transmission plc has little published record in this market. Compared with other frameworks and DPS only. Whole-market view: Repair and maintenance services of machinery (CPV 5053) →
How the contest usually goes
Winner shares use published awards; bid and price charts use contested lots.
i
How often small and medium firms win.
Share of awards where the winner’s size is known.
The counts under this question show how many awards have a known supplier size.
Across this market, small firms won 33% of awards with a known supplier size.
i
How often local firms win similar work.
Winners with a registered address in the delivery region, out of awards with a known address.
Local means the winner is registered in the region where that award was delivered.
A local branch does not count if the registered address is elsewhere.
Across this market, 67% of winners were registered in the delivery region.
i
How long buyers here take to decide after bids close.
Middle value in days from the bid deadline to the award date, on competitions that published both.
Only decided tenders count, so slow ones still waiting are not in.
Half of these awards have an award date within 125 days of the bid deadline.
i
How often work is awarded with no recorded rival.
Direct awards and tenders where every published lot count shows one bid.
The market share is a minimum: some awards have no bid count.
Thin markets produce this too; it is not proof of a tailored specification.
Across this market, at least 33% of awarded procurements had no recorded rival.
How many bids did past lots attract?
i
How many bids past lots received.
Each colour is a bid-count range. Only competed lots with a published count are included.
Past bids do not predict this tender.
1 bid14%
2–386%
4–60%
7+0%
How did awards compare with estimates?
i
Where winning prices landed against estimates.
Each colour shows awards below, close to or above the published estimate, one lot at a time.
On a framework or DPS, prices are agreed when work is called off.
Past prices are a guide, not a bid price.
Not comparable on a framework or DPS: the price is set later, on each call-off.
Assess each lot i
What past awards tell you about each lot.
See the forecast, this buyer’s earlier suppliers and firms with relevant wins.
No supplier is confirmed as a bidder.
i
What past awards tell you about each lot.
See the forecast, this buyer’s earlier suppliers and firms with relevant wins.
No supplier is confirmed as a bidder.
Open a lot for its forecast, this buyer’s previous supplier and possible competitors, from published award history, not a bid list
Lot #1CPV 5053Published estimate£7.5m
i
How many bids this lot may attract.
The forecast uses similar past competitions. The bar shows either that forecast or past bid counts; the line below says which.
Each lot shows its own forecast based on its own category; forecasts for different lots of the same notice are not comparative. The bar shows 545 past lots.
A forecast, not a list of bidders.
1 bid8%
2–329%
4–624%
7+39%
i
Where the award price may land.
The forecast uses similar awards and the buyer’s estimate. The band covers the middle half of likely prices.
No comparable awards for this lot yet.
A statistical guide from past awards, not a price to bid.
Who has supplied this buyer on similar work? i
Who has done similar work for this buyer.
Past contracts are matched by buyer, title and type of work.
A past supplier may not bid again.
i
Who has done similar work for this buyer.
Past contracts are matched by buyer, title and type of work.
A past supplier may not bid again.
No earlier contract of this buyer matches this lot on the published record.
Who could compete for this lot? i
Who could compete for this lot?
Firms with relevant past wins. On a framework, we show firms on that agreement.
None is confirmed as a bidder.
i
Who could compete for this lot?
Firms with relevant past wins. On a framework, we show firms on that agreement.
None is confirmed as a bidder.
Candidate suppliers for this notice have not been worked out yet, so this is not a verdict that nobody fits.
About this data
- Source. Official UK public procurement notices (Find a Tender), reused under the Open Government Licence v3.0. New notices arrive through the day; the figures are rebuilt nightly.
- Two views, kept apart. The authority’s own track record and the wider market for the same kind of work sit side by side and are never mixed. Where the local picture is too thin, a figure widens to a broader market and says which one it used.
- Forecasts are labelled. The price forecast and its range, possible competitors and the earlier-work matches are our estimates from past awards: not published facts, not win chances and not price advice. Official notices do not say who is bidding.
- Every figure shows what it rests on. Not every notice publishes a bid count, a value or a delivery region, so each figure carries the number of records behind it, and one built on few records is marked as such. The on a figure explains it; the counting rules are in the methodology. Spotted something wrong? Tell us.
Procedure terms & legal framework
From the official record- Procedure method
- Competitive flexible procedure
- Legal basis
- UKPGA · 2023/54 Procurement Act 2023
- Procurement category
- Services
- Notice status
- Planned procurement
- Procurement threshold
- Above threshold (FTS publication)
- Regulatory regime
- Utilities
- Commercial structure
- Framework agreement
- Who may use this agreement
- Not stated in the notice; call-off rights may be limited to the establishing authority
- Competition type
- Competitive procedure
- GPA / WTO covered
- Unspecified in notice
- Recurring procurement
- Yes · next expected 18 May 2030
- First published
- 7 Sept 2026, 13:45 BST
- Last source update
- 7 Sept 2026, 13:45 BST
- Award evaluation window
- Submission end – 10 May 2027
- Authority reference
WS5846963578- FTS notice number
2026/S 000-084427- Latest notice
- Planned procurement notice (UK3)
- Classification (CPV)
- Delivery area
- Official registry OCID
ocds-h6vhtk-06f388Find a Tender- Contract terms summary
42 days
How it was run
Official notice- Requests to participate (first stage)
- 25 Nov 2026, 23:59 GMT
- Appointment period ends
- 25 Nov 2026, 23:59 GMT
- Submission channel
- Official e-sourcing portal
- Electronic submission
- Allowed
- Accepted languages
- en
Suppliers wishing to participate in this opportunity should complete the attached 'Expression of Interest (EOI) & SAP Ariba On-boarding Form' and return it to erin.silcock@nationalgrid.com
After the Tender Notice is issued on Find a Tender, National Grid Procurement will issue the tender documents via SAP Ariba to those suppliers that have expressed their interest in response to this notice.
Timeline
7 Sept 2026 → 31 May 2027 · 5 dates- Planning notice published50 days ago7 Sept 2026, 13:45 BST
- Today27 Oct 2026
- Tender notice expectedin 22 days18 Nov 2026, 23:59 GMT
- Admission / appointment period endsin 29 days · period end, not a bid countdown25 Nov 2026, 23:59 GMT
- Award decision expected byin 195 days10 May 2027, 23:59 BST
- Contract startsin 215 days31 May 2027, 00:00 BST
Notice history
1 event · 1 release on Find a Tender- Planned procurement notice published7 Sept 2026, 13:45 BSTUK3
Commercial outcome & contract awards
Pipeline notice- Awards (0)
- No award published
- Contracts (0)
- No contract published
- Bid statistics
- No aggregate bid statistics published
Contracting authority & participating public bodies
Official documents & specifications (2)
Official links; attachments are not copiedTender pack and attachments
- Bidding documents and specifications Expression of Interest response form
Notices published for this procedure
- Planned procurement notice Planned procurement notice on Find a Tender