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 May 2020
  • Decisions
  • 1 Associated documents
Rejection of code modification proposal to the Uniform Network Code (UNC).

  • Published: 28th May 2020
  • Decisions
  • 3 Associated documents
On 28 May 2020, the Authority approved modification proposal UNC678A: ’Amendments to Gas Charging Regime (Postage Stamp)’.

  • Published: 12th May 2020
  • Decisions
  • 2 Associated documents
We have approved these modifications to the Uniform Network Code (UNC).

  • Published: 7th May 2020
  • Decisions
  • 1 Associated documents
Decision on urgency for modification to the UNC.

  • Published: 23rd Apr 2020
  • Decisions
  • 1 Associated documents
Authrity decision on urgency for modifications to the UNC.

  • Published: 19th Mar 2020
  • Decisions
  • 1 Associated documents
We have decided we cannot consider the application for urgent status for UNC717.

  • Published: 19th Mar 2020
  • Decisions
  • 1 Associated documents
We have decided we cannot consider the application for urgent status for UNC718/A/B/C.

  • Published: 14th Feb 2020
  • Agendas, minutes and presentations
  • 2 Associated documents
We are publishing CEPA’s presentation and written answers for information. These materials were prepared by a third party (CEPA) and do not necessarily reflect the views of the Authority.

  • Published: 23rd Dec 2019
  • Closed: 24th Feb 2020
  • Consultations and responses
  • 31 Associated documents
We are consulting on proposed amendments to the Gas Transmission Charging regime UNC0678/A/B/C/D/E/F/G/H/I/J

  • Published: 12th Nov 2019
  • Decisions
  • 1 Associated documents
See our decision to send back Uniform Network Code (“UNC”) 696 (“UNC696”): ‘Addressing inequities between Capacity booking under the UNC and arrangements set out in relevant NExAs’.

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