SQSS Modifications

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

For more information or for help raising an SQSS modification, 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.

ID Sort ascending NameAffectedStatusLast updated
GSR031GSR031: Introducing Competitively Appointed Transmission Owners & Transmission Service Providers Current 2 Nov 2022
GSR030GSR030: Offshore DC Connections Current 2 Nov 2022
GSR029GSR029: Review of Demand Connection Criteria to Align with EREC P2/7 Current 25 Nov 2022
GSR028GSR028: Making the SQSS Gender Neutral Current 7 Sep 2022
GSR027GSR027: Review of the NETS SQSS Criteria for Frequency Control that drive reserve, response and inertia holding on the GB electricity system Concluded 29 Nov 2021
GSR026GSR026: Adding Non- Standard Voltages to the SQSS Concluded 29 Nov 2021
GSR025GSR025: Updating the SQSS to reflect the recent modification to Engineering Recommendation P28 Concluded 29 Nov 2021
GSR024GSR024: National Grid Legal Separation Changes Concluded 13 May 2020
GSR023GSR023: Clarification of the N-1-1 Requirements and minor housekeeping change Concluded 26 Feb 2020
GSR022GSR022: Review of Security and Economy Required Transfer Conditions Concluded 3 Dec 2021