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.

Balancing data

These pages contain data and support for users of the National Electricity Transmission System (NETS). Here you will find the latest operational data, forecasts, and reports.

Data explorer

Explore cost and volume forecasts and outcomes relating to balancing services, reserve, and response.

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Forecast volumes and costs

Breakdown of operating margin (OPMR) based on forecast volume of reserve, frequency response required, annual weighting factors for STOR contracts, and BSUoS charges.

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System balancing reports

Reports we publish relating to the commercial operation of the electricity transmission system, including MBSS and other services reports.

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We maintain the system frequency between 49.5Hz and 50.5Hz, although normal operating limits of 49.8Hz to 50.2Hz normally apply.

Real-time demand data

Click here to view a graph of demand data over the last 60 minutes.

Balancing services

Find out how we keep the electricity transmission system balanced, and about tendering for balancing services.

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All aspects of the contracts for the connection to and use of the National Electricity Transmission System (NETS).

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Balancing and settlement arrangements

You can find operational data relating to balancing and settlement arrangments on the BM Reports website, via ELEXON. You can use this website to make trading decisions and understand market dynamics by accessing current and historic data.

Go to the BM Reports website