RIIO electricity transmission annual report 2017-18

Publication date
8th March 2019
Information type
Policy area

RIIO stands for revenue = incentives + innovation + outputs. This price control began on 1 April 2013 and runs for eight years, to 2021.

This report outlines our key findings on the delivery and financial performance of onshore electricity transmission owner (TO) businesses through the RIIO-ET1 price control period. It presents TO performance in the following areas:

  • achievement of annual output targets (with a specific focus on performance in 2017-18).  
  • anticipated level of delivery against outputs that adjust automatically with changing needs. 
  • the recent progress against the relevant innovation mechanisms.
  • an overview of the TO’s current expectations of costs incurred  against the total allowance anticipated across the eight-year period.