Skip to main content
Find a National Infrastructure Project

This is a beta service - your feedback will help us to improve it

Nautilus Interconnector

Project information

About the project

Type of application: Electric Lines

Name of applicant: National Grid Ventures

Nautilus Interconnector is a proposed second Interconnector between Great Britain and Belgium. It would create a new 1.4 gigawatts (GW) high voltage direct current (HVDC) electricity link between the transmission systems of Great Britain and Belgium. If constructed, the Nautilus Interconnector could supply power to one million homes. The project would involve the construction of a converter station in each country and the installation of offshore and onshore underground direct current cables (HVDC) between each converter station and underground alternating current cables (HVAC) between the converter station and substation in each country. In the UK, the offer from National Grid Electricity Transmission (NGET) allows for a connection at a new 400kV substation located close to the Sizewell 400kV network, provisionally referred to as ‘Leiston 400kV’. The current NGET substation location being promoted is less than ten kilometres from the coast.


Project stage

This project has been withdrawn.

You will be able to view any documents and information until the project is archived.


Project location

Proposed in Suffolk, in proximity to the coast near Sizewell.


Get updates

Enter your email address to receive:

  • updates on project progress
  • information on how to have your say
  • notifications when key documents are published
Read the privacy notice to see how we handle your information.
Get updates

Contact us

Telephone

If you have an interested party number, have it with you when you call.

Telephone: 0303 444 5000

Open Monday to Friday: 9am to 4pm.
Closed on weekends and bank holidays.

Email

Nautilus@planninginspectorate.gov.uk.

When writing an email, quote the name of the project in the subject line.

We aim to respond within 10 working days.

Alternative formats

Call or email to ask for project documents in alternative formats such as PDF, large print, easy read, audio recording or braille.