Network price controls and performance (2021-2028)
We set price controls for the gas and electricity network companies of Great Britain. Price controls balance the relationship between investment in the network, company returns and the amount that they charge for operating their respective networks.
RIIO-2 is the second set of price controls implemented under our RIIO model. It's an investment programme to transform the energy networks and the electricity system operator to deliver emissions-free green energy in GB, along with world-class service and reliability.
We set the price controls according to the following sectors and timeframes:
RIIO-ED2 is the price control for the electricity distribution network, where network companies take power from the transmission network and deliver it at safe, lower voltages to homes and businesses. The price control runs for five years, from 2023-2028.
The RIIO-ED1 price control covers the period from 2015-2023.
RIIO-T2 is the price control for the high voltage electricity transmission networks and high pressure gas transmission networks which transmit energy across Britain from where it is generated. The price control runs for five years, from 2021-2026.
The RIIO-T1 price control ran from 2013-2021.
RIIO-GD2 is the price control for the gas distribution network, where network companies take gas from the transmission network and deliver it at safe, lower pressures to homes and businesses. The price control runs for five years, from 2021-2026.
The RIIO-GD1 price control ran from 2013-2021.
Network performance under RIIO-2
Each year, transmission and distribution network owners must report to us on their performance against the price control.
We will publish performance reports on this page from 2022 onwards.
You can see a range of interactive data charts on networks and network performance in our Data Portal.