RIIO-2 Electricity Transmission: annual report 2024 to 2025
- Publication type:
- Transparency document
- Publication date:
- Topic:
- Electricity transmission
The report provides an overview of the onshore electricity transmission network owner (TO) businesses output delivery and financial performance during RIIO-2, the current price control period, and in relation to reporting year 2024 to 25 in particular. The supplementary data file includes additional details on performance metrics and financial comparisons referenced in the report.
Methodology
The Regulatory Instructions and Guidance (RIGs) requires all network companies to provide information to Ofgem on an annual basis. We use the annual information provided in the RIGs in preparation of this Annual Report.
We analyse this information and examine any variations in performance against annual output targets, as well as the expected under and over-spend across specific activities and cost categories. Additionally, we engage with each network company to discuss the technical aspects of their submissions and participate in direct discussions at annual company visits on specific points.
Note: some of the files attached below are not fully accessible. If you require an alternative format, please contact RIIO2@ofgem.gov.uk.