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2025-122 OFTO Cost Assessment Advisors

Ofgem

Awarded
services

This tender has closed

The submission deadline for this contract has passed. There may be more active services tenders from Ofgem, and hundreds more across the UK public sector.

Key details

Contracting authority
Ofgem
Public authority - sub-central government
Region
London
Delivery: United Kingdom, United Kingdom
Contract value
£1,666,667ex VAT
Submissions closed
Not stated by buyer
Published
2 October 2026

Procurement

Contract period
16 September 2026 - 9 September 2030
4 years
Procedure type
Open procedure
CPV classifications
  • 66171000 Financial consultancy services
  • 76500000 Onshore and offshore services
  • 79412000 Financial management consultancy services

What happened

Ofgem awarded this contract to Grant Thornton UK Advisory & Tax LLP worth £1,666,667 on 16 Sept 2026. The contract runs until 9 Sept 2030.

Description

Ofgem 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.

Awarded supplier

Supplier
Grant Thornton UK Advisory & Tax LLP
GB-PPON: PPLQ-5161-PCVN
Award value
£1,666,667
Award date
16 September 2026

Contact

Address
10 South Colonnade, London, E14 4PU
Contact name
Andrew Witcombe

Identifiers

Buyer reference
2025-122
Notice ID
093175-2026
OCID
ocds-h6vhtk-0689c7

Explore related tenders

External ID: fts-ocds-h6vhtk-0689c7 • Added 23 April 2026