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PROCUREMENT OPPORTUNITY

2025-122 OFTO Cost Assessment Advisors

Ofgem · Contract details notice on Find a Tender

Tender information last checkedLast checked 2 Oct 2026, 11:41.

Opportunity overview

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 to

Amounts belong to published awards or contracts. Where several suppliers share one value, it is labelled as shared and is not a supplier-specific allocation.

Published award value
£1.7m
Awarded
23 Jul 2026
Award ID
1
Status
active
Identifier
GB-PPON PPLQ-5161-PCVN
Location
London, UKI31, EC2M 7EA, United Kingdom

Classification

No classification was supplied.

Lots

  • Lot 1Value not stated

Documents and notices

Published notice details

Additional information from the published procurement release. Fields appear only when supplied by the source; check the original notice and tender documents before acting.

Scope, procedure and submissions

Id
2025-122
Status
complete
Procurement Method
open
Procurement Method Details
Open procedure

Legal basis

Id
2023/54
Scheme
UKPGA

Covered By

GPA

Lots and requirements

Entry 1
Id
1
Status
complete

Published documents

Entry 1
Id
conflictOfInterest
Document Type
conflictOfInterest
Description
Not published

Buyer, suppliers and contacts

Organisation 1
Name
Ofgem
Id
GB-PPON-PWXD-5991-LZZP

Identifier

Scheme
GB-PPON
Id
PWXD-5991-LZZP

Address

Street Address
10 South Colonnade
Locality
London
Postal Code
E14 4PU
Country
GB
Country Name
United Kingdom
Region
UKI42

Contact

Roles

buyer

Details

Classifications

Entry 1
Scheme
UK_CA_TYPE
Id
publicAuthoritySubCentralGovernment
Description
Public authority - sub-central government
Organisation 2
Name
Grant Thornton UK Advisory & Tax LLP
Id
GB-PPON-PPLQ-5161-PCVN

Identifier

Scheme
GB-PPON
Id
PPLQ-5161-PCVN

Address

Street Address
8 Finsbury Circus
Locality
London
Postal Code
EC2M 7EA
Country
GB
Country Name
United Kingdom
Region
UKI31

Contact

Roles

supplier

Details

Scale
large
Vcse
No
Public Service Mission Organization
No
Sheltered Workshop
No

Award information

Award 1
Id
1
Status
active
Main Procurement Category
services

Items

Item 1
Id
1
Related Lot
1

Additional Classifications

Entry 1
Scheme
CPV
Id
66171000
Description
Financial consultancy services
Entry 2
Scheme
CPV
Id
76500000
Description
Onshore and offshore services
Entry 3
Scheme
CPV
Id
79412000
Description
Financial management consultancy services

Delivery locations

Entry 1
Region
UK
Country
GB
Country Name
United Kingdom

Suppliers

Supplier 1
Id
GB-PPON-PPLQ-5161-PCVN
Name
Grant Thornton UK Advisory & Tax LLP

Related lots

1

Contracts and changes

Entry 1
Id
1
Award ID
1
Title
2025-122 OFTO Cost Assessment Advisors
Status
active
Above Threshold
Yes
Date Signed
16 Sept 2026, 00:00

Period

Starts
16 Sept 2026, 00:00
Ends
9 Sept 2030, 23:59

Value

Including VAT
2,000,000
Amount
1,666,667
Currency
GBP

Documents

Entry 1
Id
093175-2026
Document Type
contractNotice
Notice Type
UK7
Description
Contract details notice on Find a Tender
Published
2 Oct 2026, 10:29
Format
text/html

Recorded locations

  • Buyer location · London · UKI42 · E14 4PU · United Kingdom

Notice and amendment history

4 published notice versions reviewed by ProcuraAxis.

4 VERSIONS
  1. 037148-2026Tender notice on Find a Tender ·
  2. 045059-2026Tender notice on Find a Tender ·
  3. 070373-2026Contract award notice on Find a Tender ·
  4. 093175-2026Contract details notice on Find a Tender ·