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

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
PM0114 PM0114: Introducing STCP21-2 Network Asset Risk Metric (NARM) Data Exchange Concluded
PM0112 PM0112: Consequential STCP updates following implementation of RFG and HDVC into the GB Grid Code Concluded
PM0110 PM0110: Housekeeping Modification to align STCP18-1 -STCP18-6 with existing working practices Concluded
CM073 CM073: Critical Friend review period for submission of new Modifications Concluded
PM0109 PM0109: STCP27-01 Legal Separation Amendments Concluded
CM070 CM070: Consequential STC Updates following implementation of RfG and HVDC into the GB Grid Code Concluded
CM072 CM072: STC changes in the event the UK leaves the EU without an agreement Concluded
CM071 CM071: Housekeeping amendment to definition of National Grid Electricity System Operator (NGESO) for legal separation on 1 April 2019 Concluded
PM0108 PM0108: STCP 11.4 Enhanced Service Provision Concluded
PM0107 PM0107: -01 System Performance Monitoring – development of a new STCP 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.

STCP Modification Proposal Form

Download the STCP Proposal form, when we receive your Proposal, we'll check it through and work together to make sure it's easy to understand.

STC Modification Proposal Form

Download the STC Proposal form, 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.