Review of Electricity Market Arrangements (REMA)
DESNZ · DESNZ_0333_2324-Q4
Department page: Department for Energy Security and Net Zero
| Data as at | Rating | End date | Whole-life cost |
|---|---|---|---|
| March 2024 | Amber (the department's own assessment) | 31 December 2035 | £11m (price basis not stated) |
| March 2025 | Amber (the department's own assessment) | 31 December 2035 | The GMPP project is still at the planning stage (Pre-SOC or equivalent) and is not yet in a position to provide cost/schedule information |
| March 2026 | Green (the department's own assessment) | 30 April 2026 | £29.18m (in 2024/25 prices) |
Each year’s cost is shown with its price basis. Costs are not compared between years: the March 2024 and March 2025 reports state no price basis, and from March 2026 costs are in 2024/25 prices.
The department’s commentary
This is the department’s own commentary. It may use different prices from the table above, so its figures may not match.
March 2026
Rating: The Review of Electricity Market Arrangements (REMA) was successfully delivered in July 2025 with the Secretary of State's decision to retain and reform a national electricity market.
Schedule: The Review of Electricity Market Arrangements (REMA) was successfully delivered in July 2025 with the Secretary of State's decision to retain and reform a national electricity market. The schedule to deliver on the Secretary of State's decision will be carried out under the programme called Reformed National Pricing (RNP).
Cost: The Whole Life Costs for REMA provides the total cost of the programme from it's inception in 2022 through to it's closure in July 2025, following the successful delivery of the programme that led to the Secretary of State's decision to retain and reform a national electricity market.
March 2025
Rating: Compared to financial year 23/24-Q4, the Infrastructure Project Authority's Delivery Confidence Assessment rating at 24/25-Q4 remained at AMBER. This is primarily due to the following factors‚ No decision has been taken yet on whether to adopt Zonal Pricing or Reformed National Pricing. We plan to provide clarity to bidders ahead of AR7 opening in summer. This tight timeframe is impacting our delivery confidence.
Schedule: Compared to financial year 23/24-Q4, the project's end-date at 24/25-Q4 remained at 31/12/2035. This is primarily due to the following factors‚ no decision having as yet been taken on whether to adopt Zonal Pricing or Reformed National Pricing. We plan to provide clarity to bidders ahead of AR7 opening in summer.
Cost: The GMPP project is still at the planning stage (Pre-SOC or equivalent) and is not yet in a position to provide cost/schedule information
Source: NISTA Annual Report 2024-25 (data)
March 2024
Rating: The Senior Responsible Owner's Delivery Confidence Assessment rating at 23/24-Q4 is Amber. This is primarily due to the following factors. The Programme Plan up to December 2024 was approved by the Programme Board on 27th March 2024 and the Integrated Assurance and Approvals Plans (IAAP) and Risk Potential Assessment (RPA) were approved. A Gateway 1 Review Assessment meeting took place on the 25th March 2024, which set the scope of the review. Keyholders still to be allocated to support development of the Strategic Outline Business Case (SOBC), however required documentation has been shared with (Portfolio and Investment Committee) PIC.
Schedule: The project's end-date at 23/24-Q4 is 2035-12-31. This is primarily due to the following factors. Reforming electricity markets through the Review of Electricity Market Arrangements (REMA) programme is vital to the delivery of the government's plan to deliver a fully decarbonised electricity system by 2035
Cost: The project's departmental-agree Whole Life Cost at 23/24-Q4 is 11m. This is primarily due to the following factors. This WLC Covers Programme (Resource) Costs to 2035.
Source: IPA Annual Report 2023-24 (data)
Names, figures, dates, ratings and commentary are as the department reported them. Where a rating, cost or date is withheld, the file’s wording is shown. Every major project →