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 The energy network: How it works for you.

Publications and updates

  • 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.

  • Published: 19th Dec 2017
  • Reports and plans
  • 2 Associated documents
Report showing the performance of the gas distribution network companies in 2016-17, the fourth year of the current RIIO-GD1 price control.

  • Published: 24th Feb 2017
  • Reports and plans
  • 2 Associated documents
This report shows the performance of the gas distribution companies in 2015/16, the third year of the RIIO-ET1 price control.

  • Published: 24th Feb 2017
  • Reports and plans
  • 3 Associated documents
Report showing the performance of the electricity distribution companies in 2015-16, the first year of the current RIIO-ED1 price control.

  • Published: 24th Feb 2017
  • Reports and plans
  • 3 Associated documents
Report showing the performance of the gas distribution companies in 2015/16, the third year of the RIIO-GD1 price control.

  • Published: 24th Feb 2017
  • Reports and plans
  • 3 Associated documents
Report showing the performance of National Grid Gas Transmission in 2015-16, the third year of the current RIIO-T1 price control.

  • Published: 29th Jun 2016
  • Decisions
  • 4 Associated documents
We are issuing a modified set of gas distribution regulatory instructions and guidance and reporting templates for 2015/16 annual reporting.

  • Published: 17th May 2016
  • Reports and plans
  • 2 Associated documents
This report summarises the findings from the second wave of our 2015 Consumer First Panel.

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