For any queries regarding this information and to notify any intention to submit a tender, please contact Sarah Hall (sarah.a.hall@uk.ngrid.com or +44 (0)1926 654196). 

Frequency Response can be provided either as Mandatory Frequency Response, FCDM or Firm Frequency Response (FFR). FFR is the firm provision of either a Dynamic or non-Dynamic Response to changes in the system frequency. The key differences between FFR and Mandatory Frequency Response are: under FFR services can be provided by parties outside of the Balancing Mechanism and; a firm agreement regarding utillisation is made in advance of service provision. 

For more detailed information on FFR please view the information in our Balancing Services Contracts Information Pack.

FFR is open to Balancing Mechanism Unit (BMU) and non-BMU providers, demand and generation, existing Mandatory Response providers and new providers alike. The Balancing Services Contracts Information Pack describes the minimum technical requirements for FFR.

FFR is procured via a monthly process and requires pre-qualification to establish a Framework Agreement prior to tendering.  For further details of the timing of the monthly tender process please refer to the Firm Frequency Response Calendar.  The key documents for this process can be found in the FFR Final Contract Documentation Section below. If you would like to dicuss becoming an FFR provider please contact your Account Manager or the National Grid contact detailed at the top of this page.

The future requirement for FFR is described in the Market Information Report which is produced monthly.

Summaries of the tenders submitted to National Grid are contained in the Tender Report which is produced each month a tender is received.

Historic levels of FFR are contained in the Market Report which shows the volume of FFR held each day.

If you would like any further information about Firm Frequency Response please contact your Account Manager or the National Grid contact detailed at the top of this page.