January 2026 update
Over the past few years, you may have seen members of our team out on-site along the route of the project as they carry out a range of environmental surveys. These surveys are important as they help us to understand the area around our proposals so that we can take into account as we develop our plans. Surveys will continue between now and the submission of our application for development consent. While some surveys will take place on public rights of way, there will be instances where we need to access private land to carry out our work. We will always seek to agree this with the landowner/occupier where we can before the work takes place, and the members of our team carrying out survey works will always carry identification.
There may be instances that during our surveys we need to use equipment such as cameras. These are for project use only, no surveillance or monitoring of individuals or private activities is undertaken and video recordings are retained temporarily for processing and quality checking the survey outputs. Once this process is complete, the raw video footage is deleted following the survey contractor’s data retention procedures.
If you have any questions or concerns, get in touch with us via the project contact information available here.
We recently published a 2026 update newsletter, which you can read here.
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.
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 The Barn, Bignell Park Barns, Chesterton, Bicester, OX26 1TD.
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