We are becoming a separate company

In April 2019, the Electricity System Operator is becoming a separate company within the National Grid Group. Find out more about what this change will mean.

European network codes

The Third Energy Package of European legislation created a requirement for European network codes (ENC), covering grid connections, markets, and system operation. The codes are designed to provide a sustainable, secure and competitive electricity market across Europe.

Factsheets

PublishedName
SOGL Factsheet
Overview Factsheet
CACM Factsheet
DCC Factsheet
EBGL Factsheet
ER Factsheet
FCA Factsheet
HVDC Factsheet
RfG Factsheet

Joint European stakeholder group (JESG) documents

You can find further JESG documents in the 'Meeting docs' tab.

European Connection Codes Customer Letter

Terms and Conditions or Methodologies

PublishedName
CACM Art 69 explanatory note day-ahead firmness deadline 27 Oct 2016
CACM Art 57 GB TSOs Intraday proposal for arrangements concerning more than one NEMO in GB Bidding Zone 12 Dec 2016
CACM Art 45 GB TSOs Day Ahead proposal for arrangements concerning more than one NEMO in GB Bidding Zone 12 Dec 2016
CACM Art 15(1) Capacity Calculation Regions 17 Nov 2016
CACM Art 69 day-ahead firmness deadline 27 Oct 2016
CACM Art 44 IU fallback procedures 14 Dec 2016
CACM Art 44 IU explanatory note fallback procedures 14 Dec 2016
CACM Art 44 Channel fallback procedures 14 Dec 2016
CACM Art 44 Channel explanatory note fallback procedures 14 Dec 2016
CACM Art 44 Channel fallback procedures 14 Dec 2016
SOGL Art 67 and Art 70 Common Grid Model Methodology 7 September 2018
FCA Art 31 IU Regional design of long-term transmission rights 13 Oct 2017
FCA Art 51 Britned Border Specific Annex to the Harmonised Allocation Rules GB – NL BORDER 13 Oct 2017
FCA Art 51 Britned Border Specific Annex to the Harmonised Allocation Rules GB – NL BORDER 13 Oct 2017
FCA Art 51 IFA Border Specific Annex to the Harmonised Allocation Rules GB – FR BORDER 13 Oct 2017
FCA Art 31 Channel Regional design of long-term transmission rights 19 February 2018
CACM Art 17 Common Grid Model Methodology 19 May 2017
CACM Art 16 Generation and Load Data Provision Methodology 13 May 2016
FCA Art 17 Generation and Load Data Provision Methodology 23 May 2017
FCA Art 18 Common Grid Model Methodology 13 July 2018