Norwich to Tilbury is a proposal to build a new 400 kilovolt electricity transmission connection of approximately 180 kilometres in overall length from Norwich Main Substation via Bramford Substation and a new Tilbury North Substation, into Tilbury Substation. 

Our proposals include: 

• approximately 159 km of new overhead line supported on approximately 510 steel lattice pylons
• approximately 22 km of 400 kV underground cabling some of which is located through the Dedham Vale National Landscape (formerly known as Dedham Vale AONB)
• seven new CSE compounds, each with a permanent access, to connect the overhead lines to the underground cables
• a new 400 kV East Anglia Connection Node (“EACN”) substation, with a new permanent access, on the Tendring Peninsula
• a new 400 kV Tilbury North Substation to the south of Orsett Golf Course in Thurrock with access options
• modifications to the existing National Grid Electricity Transmission overhead lines, including into and out of the new 400 kV Tilbury North and access options
• substation extension works at the existing Norwich Main and Bramford substations to connect and support operation of the new transmission connection
• temporary works associated with the construction of the Project.
   

You can find more information in our document library.

Consultations 

Image

We’ve held three stages of public consultation on our proposals for Norwich to Tilbury, including a statutory consultation in summer 2024. We also held a supplementary targeted consultation between January and April 2025. 

You can find more information on the proposals we presented at each of these consultations in our document library.