Network performance under RIIO

Our RIIO-T1, RIIO-GD1 and RIIO-ED1 price controls are the first price controls to be carried out under the new RIIO (Revenue = Incentives + Innovation + Outputs) model.

RIIO is designed to encourage network companies to play a full role in delivering a sustainable energy sector, and to do so in a way that brings consumers value for money.  

The price controls run for eight years and set out what the companies have committed to deliver and the revenues they are allowed to fund their services.

Reporting company performance

Each year, the transmission and distribution network owners must report to us on their performance. Where they have not performed we will take action.  

Annual reports

As part of our performance monitoring, we publish an annual report. You can view previously published reports in the publications and updates list below.

Interactive network indicators

We additionally publish interactive charts and data covering our key monitoring themes on the Ofgem Data Portal. These cover information about the financial performance of the networks. They include the forecast rate of return for each company and their actual spending compared with what they were allowed in their price control agreements.

See all energy network charts and indicators

Further information

You can find out more about how the network fits together in our guide How the energy networks work for you.

Publications and updates

  • Published: 8th Mar 2019
  • Reports and plans
  • 3 Associated documents
A single network operator Regulatory financial reporting annex, which supports the 2017-18 RIIO-1 Annual Reports.

  • Published: 8th Mar 2019
  • Reports and plans
  • 2 Associated documents
Report showing the performance of the gas distribution network in 2017-18, the fifth year of the RIIO-GD1 price control.

  • Published: 8th Mar 2019
  • Reports and plans
  • 2 Associated documents
Report showing the performance of the electricity distribution network operators in 2017-18, the third year of the RIIO-ED1 price control.

  • Published: 8th Mar 2019
  • Charts and data, Reports and plans
  • 2 Associated documents
Report showing the performance of the electricity transmission network companies in 2017-18, the fifth year of the current RIIO-ET1 price control.

  • Published: 8th Mar 2019
  • Reports and plans
  • 2 Associated documents
Report showing the performance of National Grid Gas Transmission in 2017-18, the fifth year of the RIIO-T1 price control.

  • Published: 2nd Oct 2018
  • Open letters and correspondence
  • 3 Associated documents
Request for network operators to submit to us their RIIO financial performance for the regulatory year 2017-18.

  • Published: 7th Mar 2018
  • Charts and data
  • 1 Associated documents
Learn how the energy networks fit together and get key facts on what they have delivered under the current network price controls, 'RIIO-1'.

  • Published: 19th Dec 2017
  • Reports and plans
  • 2 Associated documents
Report showing the performance of the electricity distribution companies in 2016-17, the second year of the current RIIO-ED1 price control.

  • Published: 19th Dec 2017
  • Reports and plans
  • 2 Associated documents
Report showing the performance of the electricity transmission network companies in 2016-17, the fourth year of the current RIIO-ET1 price control.

  • Published: 19th Dec 2017
  • Reports and plans
  • 2 Associated documents
Report showing the performance of the National Grid Gas Transmission (NGGT) in 2016-17, the fourth year of the current RIIO-T1 price control.

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