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.

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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.