Uniform Network Code

The Uniform Network Code (UNC) is the hub around which the competitive gas industry revolves, comprising a legal and contractual framework to supply and transport gas.

It has a common set of rules which ensure that competition can be facilitated on level terms. It governs processes, such as the balancing of the gas system, network planning, and the allocation of network capacity.

The introduction of the UNC came about following the sale of National Grid’s four Distribution Network (GDN) businesses. While each new GDN owner, along with National Grid Gas, is still required to produce its own Network Code, to prevent inappropriate fragmentation the substantive provisions of these Codes are incorporated by reference to a common document known as the UNC.   If you wish to discuss whether you need to be a party to this code and, if so, how to become one, please contact the Joint Office of Gas Transporters directly.

Uniform Network Code Modifications

Our decisions on proposed changes to this code are included below.

Publications and updates

  • Published: 29th Jul 2019
  • Decisions
  • 1 Associated documents
Decision to carry out an IA to explore the impacts arising from the removal of the Optional Commodity Charge (OCC).

  • Published: 24th Jul 2019
  • Decisions
  • 1 Associated documents
We have approved this modification to the Uniform Network Code (UNC).

  • Published: 22nd Jul 2019
  • Decisions
  • 1 Associated documents
Decision to on urgency for a code modification proposal to the Uniform Network Code.

  • Published: 10th Apr 2019
  • Decisions
  • 1 Associated documents
See our decision to not grant urgent status for UNC686.

  • Published: 10th Apr 2019
  • Decisions
  • 1 Associated documents
This letter sets out our decision for NGG to undertake certain consultation activities required by Article 26 and the cost allocation assessment calculations required by Article 5 of TAR NC.

  • Published: 9th Apr 2019
  • Decisions
  • 1 Associated documents
We have approved this modification to the Uniform Network Code (UNC).

  • Published: 29th Mar 2019
  • Decisions
  • 1 Associated documents
We have approved this modification to the Uniform Network Code (UNC).

  • Published: 14th Mar 2019
  • Decisions
  • 1 Associated documents
We have approved this modification to the Uniform Network Code (UNC).

  • Published: 8th Mar 2019
  • Decisions
  • 1 Associated documents
Decision to extend the timetable for the development of the UNC678 proposals.

  • Published: 25th Jan 2019
  • Decisions
  • 1 Associated documents
Decision on urgency for code modification proposal to the Uniform Network Code (UNC).

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