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.

​System operator to system operator (SO to SO)

SO to SO services are provided mutually with other transmission system operators connected to Britain's transmission system via interconnectors.

The payment process for this service is set out in tri-lateral agreements between system operators and interconnector operators.


The payment for this service is dependent on the market conditions at the time of dispatch and the terms set out in the tri-lateral agreements.