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

  • Published: 20th Dec 2018
  • Decisions
  • 1 Associated documents
We have rejected these modification proposals to the Uniform Network Code (UNC).

  • Published: 30th Nov 2018
  • Decisions
  • 1 Associated documents
We have approved this modification to the Uniform Network Code (UNC).

  • Published: 26th Nov 2018
  • Decisions
  • 1 Associated documents
We have approved this modification to the Uniform Network Code (UNC).

  • Published: 25th Oct 2018
  • Decisions
  • 1 Associated documents
Decision on urgency for code modification proposal to the Uniform Network Code (UNC).

  • Published: 28th Sep 2018
  • Decisions
  • 1 Associated documents
This letter outlines our decision on South Hook Gas Company's request for urgency in relation to Modification UNC0667

  • Published: 11th Sep 2018
  • Decisions
  • 1 Associated documents
We have approved this modification to the Uniform Network Code (UNC).

  • Published: 31st Jul 2018
  • Decisions
  • 1 Associated documents
We have rejected this modification proposal to the Uniform Network Code (UNC).

  • Published: 27th Jul 2018
  • Decisions
  • 1 Associated documents
We have rejected this modification to the Uniform Network Code (UNC).

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