Use this map to navigate through the Electricity Ten Year Statement (ETYS) and the Network Options Assessment (NOA). The map is illustrative and shows identified needs to move energy from point A to point B. It does not represent specific cable routes.

Key features of this map:

Electricity Ten Year Statement (ETYS)

The ESO’s view of future transmission requirements and the capability of Great Britain’s National Electricity Transmission System (NETS) over the next 10 years.

Network Options Assessment (NOA)

Recommendations for which reinforcement projects should receive investment.

View a full list of NOA codes

Holistic Network Design (HND)

A view of the offshore network design which is part of our Pathway to 2030 work. Select a year using the slider to see how the network could be developed through time up to 2030.

Due to the amount of data in our maps, you may experience a short delay while loading boundaries.

This is the BETA version of our map of Great Britain’s electricity transmission system.

The map is for illustrative purposes. It highlights an identified need to transmit volumes of energy from point A to point B and does not represent specific cable routes.


Interactive Map



132kV Substations
220kV Substations
275kV Substations
400kV Substations
HVDCkV Substations
HVACkV Substations

Power station



Offshore projects

Round 1
Round 2
Round 2.5
Round 3
Scottish Territorial Waters Sites

Find out more

Pathway to 2030

Our summary report setting out the key messages from the detailed documents.

A Holistic Network Design for Offshore Wind

A closer look at what is needed to connect 23GW of offshore wind by 2030.

Interactive map

Visit our interactive map to have a look at the requirements for the future transmission network.


Learn more about the wider onshore network requirements needed to achieve the 2030 ambition.