This page holds the historic system frequency data for Great Britain at a 1 second resolution. It is the role of the National Grid ESO to keep the system frequency at 50 Hz, with a statutory limit of...

Firm Frequency Response (FFR) market information reports on the FFR requirement for two months ahead of the publishing month, as well as information on the contracts due to provide in the month...

The Firm Frequency Response (FFR) post tender reports are published following each monthly tender. They indicate which tenders were accepted and rejected and the information submitted for these...

This page contains live system data for transmission demand, frequency and transfers. This dataset does not currently include any files to download, all information is presented on this page. Use the...

The National Grid Electricity System Operator (ESO) publishes an annual report on the performance of the National Electricity Transmission System (NETS) in Great Britain and fulfils Transmission...