Independent Distribution Network Operators

Independent Distribution Network Operators (IDNOs) develop, operate and maintain local electricity distribution networks.

IDNO networks are directly connected to the Distribution Network Operator (DNO) networks or indirectly to the DNO via another IDNO.

What is the difference between an IDNO and a DNO?

Each of the 14 DNOs covers a separate geographical region of Great Britain. IDNOs own and operate smaller networks located within the areas covered by the DNOs. IDNO networks are mainly extensions to the DNO networks serving new housing and commercial developments.

 These are the currently licensed IDNOs:

  • Energy Assets Networks Limited
  • Energetics Electricity Limited
  • ESP Electricity Limited
  • Fulcrum Electricity Assets Limited
  • G2 Energy IDNO Limited
  • Harlaxton Energy Networks Limited
  • Independent Power Networks Limited
  • Leep Electricity Network Limited
  • Murphy Power Distribution Limited
  • The Electricity Network Company Limited
  • UK Power Distribution Limited
  • Utility Assets Limited
  • Vattenfall Network Limited

IDNOs are regulated in the same way as DNOs, except the IDNO licence does not have all the conditions of the DNO licence.

We regulate the amounts that IDNOs can charge their customers for using their networks via a ‘Relative Price Control’. This requires IDNO charges to be capped for all customers at a level broadly consistent with the DNO equivalent charge.

Publications and updates

  • Published: 10th Jun 2009
  • Agendas, minutes and presentations
  • 2 Associated documents
Minutes of the regular steering group meeting facilitated by Ofgem to discuss charging issues. Held between Distribution Network Operators (DNO) and Independent Distribution Network Operators (IDNO). Meeting held on 2 June 2009.

  • Published: 26th Nov 2008
  • Decisions
  • 1 Associated documents
This letter sets out Ofgem’s decision on the application by EDF Energy (IDNO) Ltd for an electricity distribution licence.

  • Published: 6th Aug 2008
  • Closed: 9th Sep 2008
  • Consultations and responses
  • 3 Associated documents
This letter deals with responses received to Ofgem's informal consultation letter dated 16 May 2008 (65/08) and refers to formal licence modification proposals dated 6 August 2008.

  • Published: 16th May 2008
  • Closed: 18th Jun 2008
  • Consultations and responses
  • 10 Associated documents
This open letter consultation concerns an application by EDF Energy (IDNO) Ltd for an electricity distribution licence.

  • Published: 24th Aug 2006
  • Decisions
  • 1 Associated documents
Decision letter on regulation of independent electricity distributors: affiliates of existing licensees and price control issues.

  • Published: 13th Apr 2006
  • Closed: 26th May 2006
  • Consultations and responses
  • 19 Associated documents
Consultation on implications of licence applications from affiliates of existing licensees.

  • Published: 26th Jul 2005
  • Decisions
  • 11 Associated documents
This document sets out Ofgem's decision on the appropriate long term regulatory regime for new independent distribution network operators (IDNOs) and incumbent DNOs operating outside their distribution services area.

  • Published: 18th Mar 2005
  • Consultations and responses
  • 1 Associated documents
Views are sought on whether further licence conditions should be included within the IDNO licence

  • Published: 31st Jan 2005
  • Consultations and responses
  • 16 Associated documents
See the Regulation of Independent Electricity Distribution Network Operators - Initial Proposals Document.