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 Status Last Updated Sort ascending
GC0037 GC0037: Offshore Balancing Mechanism Unit Configuration Concluded
GC0075 GC0075: Hybrid Static Compensators 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
GC0114 GC0114: System Operation Guideline: Prequalification Processes Concluded
GC0130 GC0130: OC2 Change for simplifying ‘output useable’ data submission and utilising REMIT data Concluded
GC0146 GC0146: Solutions for frequency control of Power Park Modules Concluded
GC0162 GC0162: Changes to OC6 to amend the operational timings for the delivery of the additional demand reduction above 20%, with a focus between 20% and 40% Concluded
GC0038 GC0038: Electricity Balancing System Group EBSG Concluded
GC0076 GC0076: Grid Code Limits on Rapid Voltage Changes 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

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.