Norwich to Tilbury is a proposal to build a new 400 kilovolt (kV) electricity transmission connection for approximately 180 kilometres from the Norwich Main substation via Bramford substation, a new East Anglia Connection Node (EACN) Substation and a new Tilbury North Substation. It is a key part of the Great Grid Upgrade, the largest overhaul of the electricity grid in generations. It will enable us to carry more home-grown, cleaner energy from where it is generated to whe