Industry codes

The industry codes underpin the electricity and gas wholesale and retail markets. Licensees are required to maintain, become party to, or comply with the industry codes in accordance with the conditions of their licence.

Code Administrators are the point of contact for each code where users can find out information about that code, including how to become a party to the code (if appropriate) and the rules on modifying the code. Code Administrators have committed to operating their code administration functions in accordance with the Code Administration Code of Practice (CACoP).

Code Administrators, as part of their role, act as Critical Friends to code users. The role of the Critical Friend is described in CACoP as a Code Administrator who provides support to all with an interest in the code modification process and consumer representatives. The Code Administrators have identified a list of the Top 5 activities of a Critical Friend.

The Code Administrators have developed a Central Modifications Register which details all current modifications across the eleven codes. This spreadsheet is managed by the Code Administrators and updated by them monthly.

The codes define the terms under which industry participants can access the electricity and gas networks. The table below lists the codes and contact details for them.

Code Type Code Administrator Website
Balancing and Settlement Code (BSC) Electricity Elexon
Connection Use of System Code (CUSC) Electricity

National Grid
Distribution Use of System Agreement (DCUSA) Electricity Electralink
Master Registration Agreement Electricity Gemserv
Grid Code Electricity National Grid
Distribution Code Electricity Energy Networks Association
System Operator - Transmission Operator Code (STC) Electricity National Grid

Uniform Network Code (UNC) Gas Joint Office of Gas Transporters
Independent Gas Transporter UNC (iGT UNC) Gas Gemserv
Supply Point Administration Agreement (SPAA) Gas Electralink
Smart Energy Code (SEC) Gas and Electricity SECAS
Retail Energy Code (REC) Gas and Electricity REC

Publications and updates

  • Published: 11th Aug 2015
  • Decisions
  • 1 Associated documents
We have approved this modification to the Data Transfer Services Agreement.

  • Published: 28th Apr 2015
  • Decisions
  • 2 Associated documents
We have decided to modify standard licence condition 23 of the electricity distribution licence. This modification inserts objectives into SLC 23 into the Master Registration Agreement.

  • Published: 19th Mar 2015
  • Decisions
  • 2 Associated documents
Decision to change National Grid Electricity Plc’s electricity transmission licence.

  • Published: 27th Feb 2015
  • Closed: 27th Mar 2015
  • Consultations and responses
  • 6 Associated documents
We propose to modify the standard conditions of the electricity distribution licences following an initial consultation published on 14 November 2014.

  • Published: 14th Nov 2014
  • Closed: 12th Dec 2014
  • Consultations and responses
  • 9 Associated documents
MRA objectives consultation

  • Published: 26th Sep 2014
  • Closed: 21st Nov 2014
  • Consultations and responses
  • 6 Associated documents
This letter seeks views on a potential licence modification to enable future expansion of the role of Elexon Limited.

  • Published: 16th Oct 2013
  • Open letters and correspondence
  • 1 Associated documents
This letter sets out initial Ofgem views on the findings of a recent review of Elexon’s governance, commissioned by the Balancing and Settlement Code (BSC) Panel and Elexon Board earlier this year.  

  • Published: 8th Oct 2013
  • Guidance
  • 1 Associated documents
This guidance document sets out our approach to discharging appeals brought to Ofgem against self-governance modification decisions taken under the industry codes.

  • Published: 30th Apr 2012
  • Open letters and correspondence
  • 1 Associated documents
Following its November 2011 consultation, this letter sets out our current views on the potential expansion of Elexon’s role.

  • Published: 8th Dec 2011
  • Agendas, minutes and presentations
  • 5 Associated documents
Presentation for the Potential expansion of Elexon's role - Stakeholder Workshop