We are becoming a separate company

In April 2019, the Electricity System Operator is becoming a separate company within the National Grid Group. Find out more about what this change will mean.

Fast reserve

Fast reserve provides rapid and reliable delivery of active power through increasing output from generation or reducing consumption from demand sources.


Providers submit their own availability, nomination and utilisation prices for the fast reserve service during the tender process. These prices inform the economic assessment to determine which parties are accepted.

There are three types of payment for the fast reserve service:

  • availability;
  • nomination; and
  • utilisation.

Types of payment

Availability fee (£/hour)

Paid for the hours a provider has tendered to make the service available to us.

Nomination/positional fee (£/hour)

Paid for being called upon to provide the service within a fast reserve nomination window.

Utilisation fee (£/MWh)

Paid based upon the actual level of energy delivered in a given nomination window.