Connections

As the system operator, National Grid Electricity Transmission (NGET) is required to make offers to parties seeking connection to the national electricity transmission system (NETS). The Connection and Use of System Code (CUSC) sets out the standard commercial terms between NGET and users of the NETS.  Users enter into a connection agreement in the form set out in the CUSC which, amongst other things, sets out any works required to deliver the connection.

From 11 August 2010, following the implementation of the enduring access reforms, NGET can offer terms for connection to the electricity transmission network based on a Connect and Manage approach. This allows new electricity generators  to connect to the network  once all enabling works are complete, but ahead of wider transmission system reinforcement being finished. For more detail on Connect and Manage, see NGET’s Connect and Manage Guidance.

We monitor Connect and Manage in line with our duties to protect the interests of gas and electricity consumers. Our annual report to the Secretary of State includes information contained in NGET’s Quarterly Report on the Connect and Manage Regime and the half-yearly Timely Connections Report produced by the transmission licensees in accordance with the electricity transmission licence.

Once a generator has entered into a contractual agreement with NGET (in its role as the System Operator), it may be required to provide a pre-commissioning User Commitment. This is a term for the financial liabilities placed on users that trigger investment in the transmission network.

When a network user applies to connect to NETS or to increase its existing capacity, Transmission Owners undertake the required reinforcement works to the electricity network to accommodate its needs. However, the user may decide to cancel its project or reduce its capacity.

Where the associated works have already begun and the capacity cannot be reused, this can result in unnecessary costs for wider network users and ultimately for consumers. User commitment places liabilities on users in order to financially secure the cost of investment works and protect network users.

Publications and updates

  • Published: 16th Aug 2016
  • Guidance
  • 1 Associated documents
Guidance to manufacturers that intend to apply to be classified as ‘emerging technology’ under the Requirement for Generators network code

  • Published: 14th Dec 2015
  • Open letters & correspondence, Reports & plans
  • 2 Associated documents
This is a letter from Martin Crouch, Ofgem Senior Partner, Electricity Transmission, to Andrea Leadsom, Minister of State, providing Ofgem's sixth monitoring report on the Connect and Manage electricity transmission access regime.

  • Published: 17th Dec 2014
  • Open letters & correspondence
  • 2 Associated documents
This is a letter from Martin Crouch, Ofgem Senior Partner, Smarter Grids & Governance - Transmission, to Matthew Hancock, Minister of State, providing Ofgem's fifth monitoring report on the Connect and Manage electricity transmission access regime.

  • Published: 13th May 2014
  • Decisions
  • 1 Associated documents
This is a decision letter and letter of comfort for NGET and participating Distribution Network Operators. This is related to our open letter consultation seeking views on NGET’s proposed trial of revised arrangements for the Statement of Works (SOW)...

  • Published: 22nd Jan 2014
  • Consultations & responses
  • 16 Associated documents
This is our open letter consulting on National Grid Electricity Transmission plc’s (NGET) request to trial a new approach to the Statement of Works (SOW) process. If the trial proves successful we expect NGET to bring forward a formal modification to the...

  • Published: 17th Dec 2013
  • Closed: 21st Jan 2014
  • Consultations & responses
  • 8 Associated documents
Consultation on changes to National Grid Electricity Transmission plc’s electricity transmission licence to publish the Electricity Ten Year Statement (ETYS)

  • Published: 6th Dec 2013
  • Open letters & correspondence
  • 2 Associated documents
This is a letter from Ian Marlee, Ofgem Senior Partner, Smarter Grids & Governance - Transmission, to Michael Fallon, Minister of State, providing Ofgem's fourth monitoring report on the Connect and Manage electricity transmission access regime.

  • Published: 20th Nov 2012
  • Open letters & correspondence
  • 2 Associated documents
This is a letter from Lord Mogg to John Hayes, Minister of State, providing Ofgem's third monitoring report on the Connect and Manage electricity transmission access regime.

  • Published: 30th Sep 2011
  • Open letters & correspondence
  • 2 Associated documents
This is a letter from Lord Mogg to Charles Hendry, Minster of State, providing Ofgem’s second monitoring report on the Connect and Manage electricity transmission access regime.

  • Published: 9th May 2011
  • Open letters & correspondence
  • 2 Associated documents
This is a letter from Lord Mogg to Charles Hendry, Minster of State, providing Ofgem’s first monitoring report on the connect and manage transmission access regime.