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  • National Grid Price Control Review Consultations: RIIO-GD1 & RIIO-T1

  • National Grid is funded by a price control mechanism which is agreed with and set by Ofgem. 

    Historically the Price Control Review was over a five year period and based on a retail price index model with an element of incentivised efficiency savings; this funding model was known as RPI-X.

    This has served the customer well and has delivered reduced network costs for customers by up to 50 per cent since 1990.

    The UK energy sector is now facing a number of challenges in providing safe, reliable and secure energy which will also be sustainable in a decarbonised future. 

    Project Discovery identified that £200 billion of investment will be required in the next ten years within the energy industry in order to secure sustainable energy supplies and keep costs as low as possible for consumers.  £32 billion of this falls within Ofgem’s remit and this is where RIIO will come in.

    • Introducing RIIO

    • Ofgem has introduced a new regulatory framework to replace RPI-X known as RIIO:
      Revenue= Incentives + Innovation + Outputs

      The RIIO model offers network companies real incentives for securing investment and driving innovation.  This is to ensure the delivery of sustainable energy networks for current and future customers at the lowest cost.

      The period of the next Gas Distribution and Transmission Price Control Review, on which we are now consulting, is from 2013 to 2021.



      ... real incentives for securing investment and driving innovation...
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      ... real incentives for securing investment and driving innovation...

  • Help shape the future of National Grid

  • We want to know and understand your priorities to ensure we continue to deliver energy safely, reliably and efficiently whist at the same time delivering a service we are proud of for every customer, every time.

    If you have any queries that relate to both our transmission and distribution businesses, or you’re not sure which, please email us at