We are a separate company

On 1 April Electricity Transmission became a legally separate company within the National Grid Group. Find out more about what this change means.

Network and assets

We own the national electricity transmission system in England and Wales (NETS). The NETS consists of approximately 7,200 kilometres (4,474 miles) of overhead line, 1,500 kilometres (932 miles) of underground cable and 342 substations.

Network route maps

Find out the approximate location of our national electricity transmission network routes. Check if our network may be affected by your works.

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Working near our assets

Are you going to be working close to our electricity transmission assets? Find out more about the basic safety requirements and location of our assets.

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Landowners, occupiers, and grantors

Our network traverses land that is owned and occupied by third parties. Find out more about the main areas of interaction.

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Planning and development

Find electricity-related guidance and information for national, regional, and local planning authorities and other statutory consultees.

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Enquiries about our assets

If you have any questions or need more information about our network assets, please contact Cadent's Plant Protection team.

Cadent provide first-line support for our assets so you can:

  • find out if it's safe to dig before you start
  • find out where underground electricity cables and gas pipelines are buried
  • report any works you are planning in Britain.

Phone: 0800 688 588

Email: [email protected]

Network Access Policy

National Grid Electricity Transmission’s Network Access Policy (NAP) is written to facilitate collaboration between the National Grid Electricity System Operator (NGESO) and National Grid Electricity Transmission Ltd (NGET).

The Network Access Policy is designed to deliver value for consumers in relation to the planning, management and operation of the electricity transmission system in England and Wales.

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