We are responsible for setting the price controls for the four electricity and gas transmission companies which own Britain's high-voltage national networks and the national gas pipeline. These are:
- National Grid Electricity Transmission (NGET)
- National Grid Gas NTS (National Transmission System)
- Scottish Power Transmission Limited (SPTL)
- Scottish Hydro Electric Transmission (SHE).
Current Price Control Work
Between July 2010 and December 2013 we worked with stakeholders on RIIO-T1 (formerly known as TPCR5). This is the first price control review for electricity transmission following development of our new RIIO model for network regulation. The new arrangements were implemented from 1 April 2013 and cover the period up to 31 March 2021.
This replaced arrangements set through the fourth transmission price control (TPCR4) and the TPCR4 roll over. TPCR4 took effect on 1 April 2007 and expired on 31 March 2012.
To ensure that we could reflect the final conclusions of the RPI-X@20 review, (our fundamental review of how we regulate energy network companies), we set an “adapted roll-over” of the TPCR4 price control (TPCR4 Roll-over). This extended (with limited changes) the TPCR4 arrangements to cover the period from 1 April 2012 to 31 March 2013.
You can read more about our price controls in the section Network regulation – the RIIO model.