The GB gas distribution network

There are eight gas distribution networks (GDNs), each of which covers a separate geographical region of Great Britain.

These eight networks are owned and managed by the following companies:

  • National Grid Gas Distribution Ltd  – West Midlands, North West, East of England and North London
  • Northern Gas Networks Limited – North East England (including Yorkshire and Northern Cumbria) 
  • Wales & West Utilities Limited – Wales and South West England.
  • SGN – Scotland and Southern England (including South London).

In addition there are a number of smaller networks owned and operated by Independent Gas Transporters (IGTs). These are located within the areas covered by the GDNs.

Since GDNs are natural monopolies they are regulated by us to protect consumers from potential abuse of monopoly power.

In order to be able to distribute gas through the systems, GDNs and IGTs must hold a licence. The licences contain conditions which, among other things, limit the amount of revenue which these companies can recover from their customers.

Further information on how the networks operate and where they are located can be found on the website of the Energy Networks Association.

Publications and updates

  • Published: 31st Mar 2016
  • Open letters & correspondence
  • 1 Associated documents
This open letter is to confirm that we are updating our eligibility criteria for the Scheme to make it explicit that DECC’s central heating fund is one of the eligibility criteria for the Scheme.

  • Published: 17th Dec 2015
  • Decisions
  • 2 Associated documents
This document implements the Fuel Poor Network Extension Scheme Incentive Mechanism in the gas transporter licences geld by the Gas Distribution Networks.

  • Published: 15th Dec 2015
  • Decisions
  • 1 Associated documents
This document details Ofgem’s decision following the consultation on a common methodology which shall be used by all Gas Distribution Networks (GDNs) to assess the Health, Criticality and associated Risk Value of network assets.

  • Published: 6th Nov 2015
  • Closed: 4th Dec 2015
  • Consultations & responses
  • 10 Associated documents
This document sets out a common methodology which shall be used by all Gas Distribution Networks (GDNs) to assess the Health, Criticality and associated Risk Value of network assets.

  • Published: 30th Oct 2015
  • Closed: 30th Nov 2015
  • Consultations & responses
  • 6 Associated documents
This is a statutory consultation on introducing the Fuel Poor Network Extension Scheme Incentive Mechanism.

  • Published: 30th Sep 2015
  • Decisions
  • 2 Associated documents
This document sets our final decision on our review of the Fuel Poor Network Extension Scheme.

  • Published: 18th Sep 2015
  • Decisions
  • 2 Associated documents
Our direction to National Grid Gas to use the miscellaneous pass-through term contained in Special Condition 1C of the Gas Transporter licence, to pass through money related to gas theft investigations for formula year 2014/15.

  • Published: 18th Sep 2015
  • Decisions
  • 2 Associated documents
Our direction to Northern Gas Networks to use the miscellaneous pass-through term contained in Special Condition 1C of the Gas Transporter licence, to pass through money recovered from gas theft investigations for formula year 2014/15.

  • Published: 5th Aug 2015
  • Closed: 3rd Sep 2015
  • Consultations & responses
  • 10 Associated documents
We seek your views on the revised connection targets and adjustment to allowed expenditure we are proposing to make to enable the additional connections.

  • Published: 16th Jun 2015
  • Reports & plans
  • 2 Associated documents
This report presents our assessment of the energy efficiency potential of the gas and electricity infrastructure in Great Britain.

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