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.

​Electricity Ten Year Statement (ETYS)

We publish the ETYS annually in our role as the electricity system operator. It's part of the annual electricity transmission planning cycle, and shows the likely future transmission requirements of bulk power transfer capability of the National Electricity Transmission System (NETS). This is based on the Future Energy Scenarios (FES), which help us capture a wide range of future network requirements.

About the 2018 ETYS

The ETYS is all about understanding what the requirements will be for the National Electricity Transmission System to transfer bulk power over the next decade – where future growing needs might occur – so that as the Electricity System Operator we can plan ahead to manage the network effectively and securely. The ETYS includes contributions from the GB transmission owners.

This year’s ETYS shows how we are improving our network development analysis and tools as part of our commitments in the ESO Forward plan. It presents the initial findings of two pathfinder projects, i.e., the regional voltage analysis and the year round thermal analysis. These findings highlight the importance of studying the future network requirements in conditions other than the winter peak.

Transmission developments and how they are assessed will now be published as part of the Network Options Assessment (NOA) report.

Past ETYS documents