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 Sort ascending
PM087 PM087: Updating of codes in the NGET Outage database TOGA in STCP11-2 to better reflect requirements and current process Concluded
PM0102 PM0102: National Grid Legal Separation - consequential changes to STCPs to reference NGESO Concluded
CM073 CM073: Critical Friend review period for submission of new Modifications Concluded
PM0121 PM0121: STCP16-1 Bay Reservation Amendment Concluded
CM087 CM087: Introducing Connections Process to facilitate Competitively Appointed Transmission Owners Current

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.