Network price controls

We are responsible for setting the price controls for the company that owns Britain’s high-pressure gas network, National Grid Gas Plc.

Current Price Control Work

Between July 2010 and December 2013 we worked with the company and its customers and other stakeholders on RIIO-T1 (formerly known as TPCR5). This is the first price control review for gas 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.

Publications and updates

  • Published: 14th Mar 2018
  • Closed: 11th Apr 2018
  • Consultations and responses
  • 5 Associated documents
Notice proposing modifications to the Regulatory Instructions and Guidance (RIGs) for RIIO-GT1 (version 5.1)

  • Published: 26th Apr 2016
  • Closed: 26th May 2016
  • Consultations and responses
  • 4 Associated documents
Notice relating to a modified set of gas transmission regulatory instructions and guidance (RIGs) and reporting templates for 2015-16 annual reporting.

  • Published: 4th Mar 2013
  • Factsheets
  • 1 Associated documents
Ofgem, as the regulator, sets price controls for the companies that operate Britain’s gas and electricity networks. This factsheet explains why price controls are needed, how they work and what they mean for the domestic consumer.