To ask the Secretary of State for Business, Energy and Industrial Strategy, with reference to his Department's BEIS Electricity Generation Costs (2020) published on 24 August 2020, if he will publish the empirical, numerical evidence underlying its estimate of (a) stagnant capital and (b) operational cost for (i) Combined Cycle Gas Turbines and (ii) other conventional generation technologies in that report.
This answer is the replacement for a previous holding answer.
12 January 2021
The evidence behind the (a) capital and (b) operational cost assumptions for (i) Combined Cycle Gas Turbines and (ii) other conventional generation technologies has been published in a report prepared by Leigh Fisher and Jacobs (2016). Minor updates to Combined Cycle Gas Turbine efficiency have been made since, as a result of a published benchmarking exercise by Wood (2018), which affects operational costs.
 ‘Leigh Fisher and Jacobs’ (2016): Electricity Generation Cost Update’ https://www.gov.uk/government/publications/leigh-fisher-and-jacobs-2016-electricity-generation-cost-update
 ‘Call for CCUS Innovation: literature review, benchmarking report and calculator’ https://www.gov.uk/government/publications/call-for-ccus-innovation-literature-review-benchmarking-report-and-calculator