Looking for more information about the 9 August power cut?

See our interim technical report and other ESO resources.

Firm frequency response (FFR)

FFR creates a route to market for providers whose services may otherwise be inaccessible. The FFR service gives us and service providers both a degree of stability against price uncertainty under the mandatory service arrangements.

We assess whether the cost of a FFR tender is likely to be less or greater than the cost of an alternative to deliver the equivalent level of frequency response service.