You can raise a modification – or mod – when you want to propose a change to any part of the Grid Code. 

For more information, please contact [email protected]

Search for any current or concluded modifications by name or ID. You can sort mods by ID, name, status or date of update. Or filter according to status.

Views reference
ID Name Status Last Updated Sort ascending
GC0147 GC0147: Last resort disconnection of Embedded Generation – enduring solution Concluded
GC0042 GC0042: Information on Small Embedded Power Stations and Impact on Demand Concluded
GC0077 GC0077: Suppression of Sub-Synchronous Resonance from Series Capacitive Compensation Concluded
GC0116 GC0116: Correction to the compliance dates included in modifications GC0100-102 for the Requirements for Generators (RfG) and HVDC European Network Codes and other minor housekeeping changes Concluded
GC0132 GC0132: Updating the Grid Code governance process to ensure we capture EBGL change process for Article 18 Terms and Conditions (T&Cs) Concluded
GC0044 GC0044: Grid Code Changes Resulting From BSC Modification P276 Concluded
GC0080 GC0080: Relevant Electrical Standards (RES) Updates Concluded
GC0100 GC0100: EU Connection Codes GB Implementation – Mod 1 Concluded
GC0133 GC0133: Timely informing of the GB NETS System State condition Concluded
GC0149 GC0149 - Grid Code changes to reflect the terms of the UK’s departure from the EU Concluded

More about modifications

Modification Tracker

Our Tracker gives you the latest details on current code modifications including the purpose and the stakeholders it affects, as well as panel comments and where it is in the review process. It is published on the 7th (or next working day) of each month.

Modification Proposal Form

If you're thinking about raising a modification, please get in touch with us. Our experts can give you advice on your Proposal, explain how the modification process works and help to answer any questions you may have. When we receive your Proposal, we'll check it through and work together to make sure it's easy to understand.

Calendar

Once you've been in touch and are ready to write your Proposal paper, send it to us by the monthly modification submission date which you can find on our Calendar.