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Security and Quality of Supply Standards

The Security and Quality of Supply Standards set out criteria and the methodology for planning and operating the National Electricity Transmission System (NETS).

The Security and Quality of Supply Standards (SQSS) establish a coordinated set of criteria and methodologies that transmission licensees use in planning and operating the NETS.

We are the administrator for the SQSS, which we maintain together with other transmission licensees.

All changes are subject to industry consultation and approval by Ofgem.

If you can't find what you're looking for here, please contact us and we will try to assist you.