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.

Grid Code

The Grid Code is the technical code for connection and development of the National Electricity Transmission System (NETS).


ID Name Status Last updated Sort ascending
GC0096 GC0096: Energy Storage Current 18 Jan 2019
GC0118 GC0118: Modification to the Grid Code to accommodate the recent Distribution Code modification to Engineering Recommendation P28 –Voltage fluctuations and the connection of disturbing equipment to transmission systems and distribution networks in the UK Current 16 Jan 2019
GC0112 GC0112: National Grid Legal Separation Grid Code changes to incorporate NGESO Concluded 15 Jan 2019
GC0106 GC0106: Data exchange requirements in accordance with Regulation (EU) 2017/1485 (SOGL) Current 11 Jan 2019
GC0068 GC0068: Grid Code New and Revised Unit Data and Instructions Current 9 Jan 2019
GC0114 GC0114: System Operation Guideline: Prequalification Processes Current 7 Jan 2019
GC0105 GC0105: System Incidents Reporting Current 30 Nov 2018
GC0108 GC0108: EU Code: Emergency & Restoration: Black start testing requirement Current 22 Nov 2018
GC0050 GC0050: Demand Control OC6 Concluded 13 Nov 2018
GC0097 GC0097: Grid Code Processes Supporting TERRE Current 25 Sep 2018