National Grid are seeking views for the proposed upgrade to the electricity transmission system in East Anglia between Norwich and Tilbury. The project includes a new 400 kilovolt (“kV”) electricity transmission connection of approximately 184 kilometres (“km”) in overall length from Norwich Main Substation and Tilbury Substation via Bramford Substation, comprising:

• approximately 159 km of new overhead line supported on approximately 510 steel lattice pylons (approximately 50 metres (“m”) in height) some of which are gantries (typically up to 15 m in height) within proposed Cable Sealing End (“CSE”) compounds or existing or proposed substations
• approximately 25 km of 400 kV underground cabling some of which is located through the Dedham Vale National Landscape (formerly known as Dedham Vale AONB)
• six 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. This is proposed to be an Air Insulated Switchgear (“AIS”) substation
• substation extension works at the existing Norwich Main and Bramford substations and works within the existing Tilbury Substation to connect and support operation of the new transmission connection
• temporary works associated with the construction of the Project.

An alternative design at the Waveney Valley (referred to as the Waveney Valley Alternative) is also being considered and is the subject of consultation and ongoing assessment. This design alternative, if taken forward, would result in changes to those elements of the Project set out below. This would instead comprise:

• installation of approximately 157 km of new 400 kV overhead line
• installation of approximately 27 km of 400 kV underground cabling (some of which is located through the Dedham Vale National Landscape)
• eight new CSE compounds (each with a permanent access) to connect the overhead lines to the underground cables.

The consultation starts at 12:00 noon on Wednesday 10 April 2024 and runs until 11:59pm on Tuesday 18 June 2024. 

For full details and how to take part please visit:  https://www.nationalgrid.com/electricity-transmission/network-and-infrastructure/infrastructure-projects/norwich-to-tilbury/public-consultation-and-programme

If you have any questions about the Project, please don’t hesitate to email: contact@n-t.nationalgrid.com