Official UK procurement notice
2025-122 OFTO Cost Assessment Advisors
Authority: Ofgem (Public body)
What is being bought
Published requirement descriptionOfgem is looking to procure the necessary Cost Assessment advisors for the Offshore Transmission Owners (OFTO) team to continue its regulatory duties. Provision of these services will be crucial and without this, Ofgem will be unable to run effective tender processes for the upcoming tender rounds.
Ofgem are required to run a tender exercise for all offshore transmission projects that qualify under the Tender Regulations 2015. Provision of Cost Assessment consultancy support services will be crucial to ensure that a robust tender process takes place for upcoming tender rounds and without this, Ofgem will be unable to run an effective tender process.
To facilitate a robust tender evaluation process, Ofgem requires the services of a supplier on various aspects of the tender and transaction process - evaluation of bidder submissions, and financial assessment required to bring the project to close/appoint an OFTO.
Ofgem are required to undertake a cost assessment review of the OFTO assets for those projects that will be the subject of the tender process.
This review is fundamental in determining the cost of building the transmission assets to ensure that those costs stated by the developer fairly reflect what will be transferred and that consumers are receive value for money. With this being the case, data submitted by the project developer must be carefully evaluated to ensure that assets are being transferred in the most economic and efficient manner possible.
- No preliminary market engagement: Not published as no preliminary engagement took place.
CPV: Financial auditing services · Financial consultancy services · Financial management consultancy services · Onshore and offshore services
The lotProcurement structure
single lot · value publishedLot #1AwardedPublished value£1,666,000
- Economic & financial standing
Participation is open to economic operators that are legally constituted and able to enter into a legally binding contract with Ofgem. Suppliers must not be subject to any mandatory or discretionary exclusion grounds under applicable procurement legislation. Legal standing will be assessed via the Procurement Specific Questionnaire. Suppliers must demonstrate appropriate financial standing and economic capacity to deliver the services. Financial standing will be assessed as part of the Procurement Specific Questionnaire and may include financial and credit checks undertaken by Ofgem.
- Technical & professional ability
Further details to be found in the ITT Documents
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).
Published sub-criteria (2)
- Technical: 65%
- Commercial: 35%
Published award criteria (2)
- Technical: Assessment of the quality of the tender response in accordance with the evaluation methodology set out in the tender documentation
- Commercial: Assessment of price in accordance with the commercial evaluation methodology set out in the tender documentation
- Economic & financial standing
Participation is open to economic operators that are legally constituted and able to enter into a legally binding contract with Ofgem. Suppliers must not be subject to any mandatory or discretionary exclusion grounds under applicable procurement legislation. Legal standing will be assessed via the Procurement Specific Questionnaire. Suppliers must demonstrate appropriate financial standing and economic capacity to deliver the services. Financial standing will be assessed as part of the Procurement Specific Questionnaire and may include financial and credit checks undertaken by Ofgem.
- Technical & professional ability
Further details to be found in the ITT Documents
- Price carries 35 of 100 points: a 10% discount moves about 3.5 points. The method statement decides this lot, not the discount.
Price arithmetic assumes straight proportional scoring; the tender pack may use another formula.
Procedure terms & legal framework
From the official record- Procedure method
- Open procedure
- Legal basis
- UKPGA · 2023/54 Procurement Act 2023
- Procurement category
- Services
- Notice status
- Awarded
- Procurement threshold
- Above threshold (FTS publication)
- Regulatory regime
- Standard
- Commercial structure
- Stand-alone contract (no framework)
- Competition type
- Competitive procedure
- GPA / WTO covered
- Yes (GPA)
- Recurring procurement
- Unspecified in notice
- First published
- 23 Apr 2026, 14:42 BST
- Last source update
- 2 Oct 2026, 10:29 BST
- Award evaluation window
- Submission end – 29 Jun 2026
- Authority reference
2025-122- FTS notice number
2026/S 000-037148- Latest notice
- Contract details notice (UK7)
- Classification (CPV)
- Delivery area
- Official registry OCID
ocds-h6vhtk-0689c7Find a Tender- Contract terms summary
Payment will be made in accordance with the Contract and applicable schedules. Charges shall be based on the agreed daily rates
submitted by the supplier at tender stage and applied in line with the requirements of the relevant call‑off.
Payment will be subject to the satisfactory delivery of services and submission of valid invoices in accordance with the contract terms.
Further details of invoicing, payment timing and any reporting requirements are set out in the Contract
- Risks
Key risks to the successful delivery of the contract include:
Availability and retention of suitably skilled and experienced resources over the contract period;
Conflicts of interest arising from suppliers' wider market activities and relationships with OFTO's or their supply chains;
Dependence on timely provision of information and cooperation from third parties
These risks will be managed through contractual controls, governance arrangements, reporting requirements and performance management mechanisms as set out in the contract.
How it was run
Official notice- Submission deadline
- 22 May 2026, 17:00 BST
- Clarification deadline
- 14 May 2026, 12:00 BST
- Electronic submission
- Allowed
- Accepted languages
- en
Timeline
23 Apr 2026 → 2 Oct 2026 · 8 dates- Tender notice published176 days ago23 Apr 2026, 14:42 BST
- Clarification questions by155 days ago14 May 2026, 12:00 BST
- Submission deadline147 days ago22 May 2026, 17:00 BST
- Award decision expected by108 days ago29 Jun 2026, 23:59 BST
- Assessment summaries sent84 days ago24 Jul 2026, 00:00 BST
- Contract starts76 days ago1 Aug 2026, 00:00 BST
- Standstill ends71 days ago5 Aug 2026, 23:59 BST
- Latest notice published14 days ago2 Oct 2026, 10:29 BST
Notice history
7 events · 4 releases on Find a Tender · since 23 Apr 2026- Tender notice published23 Apr 2026, 14:42 BSTUK4
- Tender notice published15 May 2026, 16:24 BSTUK4
- Deadline moved to 22 May 2026, 17:00 BST15 May 2026, 16:24 BST+1 days · was 21 May 2026, 12:00 BST
- Contract award notice published24 Jul 2026, 14:52 BSTUK6
- Status changed to complete24 Jul 2026, 14:52 BST
- Contract signature expected7 Aug 2026, 23:59 BSTscheduled
- Contract details notice published2 Oct 2026, 10:29 BSTUK7
Published amendments (1)
The Authority has extended the deadline for submission of Tenders.
Routine re-releases (4)
- 2026-04: 1 release · 23 Apr 2026
Commercial outcome & contract awards
Published awards, contracts and bid statistics, not a forecast| Awarded to | Value | Date | Status |
|---|---|---|---|
| GRANT THORNTON UK ADVISORY & TAX LLP2025-122- Cost Assessment Advisors to OFTO team for Tender & Policy10 Aug 2026 – 9 Aug 2030 | £1,666,000 | 24 Jul 2026 | Awarded |
Contracts
2025-122 OFTO Cost Assessment Advisors · GRANT THORNTON UK ADVISORY & TAX LLP
- Signed
- 16 Sept 2026
- Value
- £1,666,667
- Period
- 16 Sept 2026 – 9 Sept 2030
- Status
- active
Bid statistics published by the authority
| Bids | SME | VCSE | Valid bid range |
|---|---|---|---|
| 2final-stage tenders | 0 | 0 | — |
Contracting authority & participating public bodies
Bidders & participating suppliers
1 commercial party on the notice- Grant Thornton UK Advisory & Tax LLPAwarded supplier
Official documents & specifications (6)
Official links; attachments are not copiedTender pack and attachments
- Bidding documents and specifications 2025-122- Cost Assessment Advisors to OFTO team for Tender& Policy ITT
- Bidding documents and specifications 2025-122- Cost Assessment Advisors to OFTO team for Tender& Policy ITT
Notices published for this procedure
- Contract details notice Contract details notice on Find a Tender
- Contract award notice Contract award notice on Find a Tender
- Tender notice Tender notice on Find a Tender
- Tender notice Tender notice on Find a Tender