April 2025 update
Our statutory consultation has now closed. Thank you to everyone who took the time to participate in this consultation and provide feedback on our proposals.
We will carefully consider all comments received to this consultation alongside the outcome of ongoing technical and environmental assessments as we look to finalise our proposals and prepare our application for development consent. A full account of how we have considered consultation feedback will be provided in the Consultation report, which we will prepare as part of our development consent order (DCO) application.
Although the consultation has finished, all documents published as part of this and previous consultations are still available to view in our Document library. Our contact channels remain open for anyone who has questions about the project.
About North Humber to High Marnham
National Grid Electricity Transmission is proposing to reinforce the electricity transmission network between the north of England and the Midlands by building a new 400 kilovolt (kV) electricity transmission connection between two proposed substations at Birkhill Wood and High Marnham.
The proposed reinforcement is required to increase the capability of the electricity transmission network between the north of England and the Midlands. It is also needed to facilitate the connection of proposed new offshore wind farms that are planned in the area.
You can read more about our proposals here, or view them on our Interactive map.
Why is this happening?
With growing offshore wind generation and increased interconnection, an anticipated tripling of wind generation connected across the Scottish networks by 2030, and the Government’s ambition to connect 50 GW of offshore wind by 2030, north-south power flows are set to increase. If all the proposed new offshore wind that is planned to connect into the Creyke Beck area gets built, this would amount to just over 13 gigawatts (GW) of generation capacity by the early 2030s.
The existing network serving the Creyke Beck area can export just under 7 GW of electricity while remaining compliant with the Security and quality of supply standards to which the network is operated. The network as it is today would therefore not have the capacity needed to export the significant forecast increase in contracted generation out of the area, or to accommodate the north-south power flows that are expected. Because of this, we need to increase the capability of the transmission network between the north of England and the Midlands.
Project programme
Non-statutory consultation: June – July 2023
Localised non-statutory consultation: July – August 2024
Statutory consultation: February – April 2025
DCO submission: Summer 2026
Start of construction (if approved): From 2028
Fully operational: From 2031
Reinstatement works complete: From 2033
Contact the team
If you have any questions or comments about North Humber to High Marnham, please get in touch by emailing [email protected], by calling 0808 189 1346, or by writing to Freepost NH TO HM.
If you are a landowner and believe your property may be affected by our proposals, to speak to our Lands team you can email [email protected], call 0333 188 3511 or write to Unit 1, Staplehurst Farm, Weston on the Green, OX25 3QU.