RIIO-T1 network price control

In March 2008, we launched a comprehensive review of the RPI-X framework we used to regulate gas and electricity networks. This review was known as the RPI-X@20 review.

Our recommendation from this review was the need to use a new regulatory framework built on elements of the previous approach but with important new elements. It is known as the 'RIIO model' .

'RIIO' stands for: Revenue = Incentives+Innovation+Outputs

It builds on the success of the previous RPI-X regime, but better meets the investment and innovation challenge. It does this by placing much more emphasis on incentives to drive the innovation needed to deliver a sustainable energy network that offers value for money to existing and future consumers. The RIIO framework is designed to promote smarter gas and electricity networks for a low carbon future.

RIIO-T1 is the first transmission price control review to reflect the RIIO regulatory framework.

RIIO-T1 sets out what the transmission network companies are expected to deliver and details of the regulatory framework that supports both effective and efficient delivery for energy consumers over the eight years from 2013 – 2021.  

You can read our RIIO-T1 documentation below.

Publications and updates

  • Published: 16th Jun 2020
  • Decisions
  • 8 Associated documents
Direction to modify the RFPR/Pension Regulatory Instructions and Guidance (RIGs) for RIIO1.

  • Published: 29th Apr 2020
  • Closed: 27th May 2020
  • Consultations and responses
  • 10 Associated documents
Notice proposing modifications to the RFPR and Pension Regulatory Instructions and Guidance (RIGs) and reporting templates.

  • Published: 29th Nov 2019
  • Decisions
  • 1 Associated documents
RIIO-GT1 Directions for the Annual Iteration Process November 2019

  • Published: 29th Nov 2019
  • Decisions
  • 4 Associated documents
Directions issued in respect of the Annual Iteration Process which took place by 30 November 2019 for the RIIO-ET1 Price Control Financial Model.

  • Published: 21st Nov 2019
  • Decisions
  • 1 Associated documents
Decision on the RIIO-T1 Environmental Discretionary Reward for the 2018-19 scheme year

  • Published: 5th Sep 2019
  • Charts and data
  • 1 Associated documents
This is the ET1 Price Control Financial Model for the Annual Iteration Process that is planned to take place by 30 November 2019.

  • Published: 5th Sep 2019
  • Decisions
  • 1 Associated documents
Direction to modify the ET1 Price Control Financial Model to amend the allocation of SPTL’s Innovation roll out mechanism expenditure to 100% load related capex expenditure.

  • Published: 5th Sep 2019
  • Charts and data
  • 1 Associated documents
This is the GT1 Price Contol Financial Model for the Annual Iteration Process that is planned to take place by 30 November 2019.

  • Published: 4th Sep 2019
  • Decisions
  • 1 Associated documents
Direction to modify the GT1 Price Control Financial Model by amending two labels

  • Published: 27th Aug 2019
  • Closed: 24th Sep 2019
  • Consultations and responses
  • 8 Associated documents
We are consulting on our initial views on the need case for St Fergus and Hatton proposed compressor investment.

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