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National Grid ESO
Key takeaways
- National Grid ESO is the body responsible for balancing electricity supply and demand on Great Britain’s grid in real time.
- Its actions show up in business bills through charges like BSUoS.
- From the planned Future System Operator (FSO) transition, the role is moving to a new independent public body — the function stays the same.
What does National Grid ESO do?
National Grid ESO (Electricity System Operator) keeps the lights on by matching the second-by-second supply of electricity to demand across Great Britain. It dispatches generation, manages constraints on the transmission network, and coordinates ancillary services like frequency response and reserve.
Its work doesn’t appear directly on your bill, but its cost of balancing the system is recovered through BSUoS (Balancing Services Use of System), which then flows through to suppliers and on to non-commodity charges on business bills.
Why business buyers care
ESO actions to keep the grid balanced help drive system balancing costs — recovered via BSUoS.
ESO operates the Capacity Market on behalf of government, which contributes to non-commodity costs.
ESO is also at the heart of Demand Side Response programmes — opportunities for flexible businesses to earn revenue.
