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
GC0121 GC0121 - Grid Code changes in the event the UK leaves the EU without an agreement Concluded
GC0122 GC0122 - Amending references to NGET and the Company within the Grid Code following previous modifications Concluded
GC0123 GC0123 Clarifying references to NGET and Relevant Transmission Licensees Concluded
GC0124 GC0124 Critical Friend review period for submission of new modifications Concluded
GC0125 GC0125 EU Code Emergency & Restoration: Black Start testing requirements for Interconnectors Concluded
GC0126 GC0126: Implementing Profiled Stable Import and Export Limits, and reversing unimplemented aspects of GC0068 Concluded
GC0127 GC0127 EU Code Emergency & Restoration: Requirements resulting from System Defence Plan Concluded
GC0128 GC0128 EU Code Emergency & Restoration: Requirements resulting from System Restoration Plan Concluded
GC0129 GC0129 - Updating the Grid Code to use Engineering Recommendation G5/5 - Harmonics Concluded
GC0130 GC0130: OC2 Change for simplifying ‘output useable’ data submission and utilising REMIT data 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.