Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, whether her Department has made a recent comparative estimate of the economic cost of delivering baseload provision to the national grid from (a) pumped-hydro storage and (b) new nuclear solutions.

Data on cost estimates for electricity generation technologies and cost estimates for storage technologies along with their methodologies, data and assumptions are found in the Electricity Generation Costs and Storage Cost and Technical Assumptions reports respectively, published by the Department for Energy Security and Net Zero. These are not directly comparable for pumped hydro storage and nuclear generation given the different cost base and operating characteristics.

These reports can be found at: https://www.gov.uk/government/publications/electricity-generation-costs-2023 and https://www.gov.uk/government/publications/storage-cost-and-technical-assumptions-for-electricity-storage-technologies.