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  • Exit Capacity Substitution and Revision Methodology Statement

  •  The Exit Capacity Substitution and Revision Methodology statement (ExCS) describes the methodology that National Grid uses to determine proposals for:

     • the substitution of NTS exit baseline capacity from one NTS Exit Point (where it is not required) to another in response to a request  for additional capacity; and/or

     • the revision to NTS baseline exit capacities at NTS Exit Points where new pipeline infrastructure installed to facilitate the release of incremental entry capacity has a beneficial impact on the availability of exit capacity.

      In particular, it defines:

     • under what circumstances National Grid will consider such substitutions and revisions; and

     • the process to be undertaken by National Grid to determine its proposals to substitute capacity and/or revise baselines.

    At the top of this page is the current version of the ExCS. Below this are documents relating to any review of the ExCS and related consultation material that is currently being consulted upon.

  • Current Approved Statement

  • The current statement can be found below, along with the Authority's letter of approval.
  • 17 Jan 2017
    Exit Capacity Substitution Methodology Statement (Approved) v6.0 - Effective 17 January 2017
    1401 KB

    17 Jan 2017
    Substituton Methodologies - Ofgem Decision Letter (January 2017)
    141 KB

    10 May 2017
    Report on the Application of the Capacity Methodologies During Formula Year 2016-17
    482 KB

  • Current Review and Industry Consultation

  • Documents associated with the current consulation for this methodology can be found below.
  • 17 May 2017
    Consultation response – WWU (May 2017)
    469 KB

    15 May 2017
    Consultation response – Centrica (May 2017)
    258 KB

    13 Apr 2017
    Consultation Cover Letter (EU - April 2017)
    192 KB

    13 Apr 2017
    Exit Capacity Substitution Methodology Statement (Consultation) v6.1 - Effective 31 July 2017
    1410 KB

    13 Apr 2017
    ExCS v6.1 - Comparison v6.1 to v6.0
    1548 KB

  • If you would like to see the archived material for this methodology statement please select the link below.
  • Archive: Exit Capacity Substitution Methodology Statement

    Archive: Exit Capacity Substitution and Revision Methodology Statement

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