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
Modification status
ID Name Sort descending Status Last Updated
GC0091 GC0091: Joint GCRP DCRP Workgroup on GB Application of Demand Connection Code Concluded
GC0092 GC0092: Using National Grid Network Models for Long-term Planning Concluded
GC0093 GC0093: Assessment of System Warnings Concluded
GC0094 GC0094: Relevant Electrical Standards RES Updates Concluded
GC0095 GC0095: GB implementation workgroup for Transmission System Operation Guideline TSOG European Network Code Concluded
GC0096 GC0096: Energy Storage Concluded
GC0097 GC0097: Grid Code Processes Supporting TERRE Concluded
GC0098 GC0098: Using GB Grid Code data to construct the EU Common Grid Model in accordance with Regulation EU 2015 1222 CACM and Regulation EU 2016 1719 FCA Concluded
GC0099 GC0099: Establishing a common approach to interconnector scheduling consistent with the single intraday market coupling processes set out within Regulation EU 2015 1222 CACM Concluded
GC0100 GC0100: EU Connection Codes GB Implementation – Mod 1 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.