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.

Transmission constraint management

Constraint management is required where the electricity transmission system is unable to transmit power to the location of demand, due to congestion at one or more parts of the transmission network. Here you can find out how to provide this service.

Constraint management requirements are linked to specific system needs, so will be advertised ad hoc to match each requirement, rather than following a regular timetable.

We will contact potential providers and, where there is sufficient competition, we'll seek to contract via a tender.

In other circumstances, we will enter into bilateral contracts with service providers.