The UK’s power transmission system operator (TSO) National Grid has invited public consultations on three new proposed transmission projects in the United Kingdom, namely Eastern Green Link (EGL) 3, 4 and 5. These consultations are part of The Great Grid Upgrade, a major overhaul of the UK electricity network, set to provide new network capacity to meet the UK’s demand, which is expected to double by 2050.
EGL 3 and 4, developed by National Grid and SP Energy Networks, will facilitate the transport of power between Scotland (EGL3 at Peterhead; EGL4 at Westfield) under the North Sea and England at Anderby Creek on the Lincolnshire coast. From there, underground cables would run approximately 100 km to converter stations in the Walpole area of King’s Lynn and West Norfolk, before connecting to the existing transmission network via a new substation.
EGL5 is a newly proposed project, being developed by National Grid and SSEN Transmission. It would run approximately 555 km under the sea from Scotland also landfalling at Anderby Creek and then continue 9 km underground to a new converter station in East Lindsey, Lincolnshire.
SP Energy Networks and National Grid started building the 2 GW Eastern Green Link 1 project in February 2025, and are also developing the Eastern Green Link 2 project. Both are also connecting Scotland and England.