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 Sort descending Status Last Updated
GC0022 GC0022: Frequency Response Concluded
GC0023 GC0023: Protection Fault Clearance Times and Back-up Protection Concluded
GC0028 GC0028: Constant Terminal Voltage Concluded
GC0036 GC0036: Review of Harmonics Assessment Standards and Processes Concluded
GC0037 GC0037: Offshore Balancing Mechanism Unit Configuration Concluded
GC0038 GC0038: Electricity Balancing System Group EBSG Concluded
GC0042 GC0042: Information on Small Embedded Power Stations and Impact on Demand Concluded
GC0044 GC0044: Grid Code Changes Resulting From BSC Modification P276 Concluded
GC0048 GC0048: Joint GCRP DCRP Workgroup on GB Application of RfG Concluded
GC0050 GC0050: Demand Control OC6 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.