The new line would have an overall length of approximately 90 kilometres (km) and would run between two proposed new substations: one to the north of Hull at Creyke Beck in the East Riding of Yorkshire (Birkhill Wood), and one at High Marnham in Nottinghamshire.

A full summary of our proposals is as follows:

• approximately 90 km of new 400 kilovolt (kV) overhead line between the new Birkhill Wood and High Marnham 400 kV substations
• replacement and realignment of a section of the existing 400 kV overhead line route between Brantingham and east of Broomfleet
• replacement and realignment of a section of the existing 400 kV overhead line route between Ealand and west of Keadby
• a new 400 kV Birkhill Wood gas insulated switchgear¹ substation with a new permanent access
• replacement and realignment of a section of existing 400 kV overhead line to connect the new Birkhill Wood substation
• a new 400 kV High Marnham air insulated switchgear¹ substation with new permanent access
• replacement and realignment of sections of two existing 275 kV overhead lines and two 400 kV overhead lines, to allow for connection into the new High Marnham substation
• other required works, such as temporary diversions for works on existing overhead line routes, temporary access roads, highway works, temporary works compounds, work sites, utility diversions, drainage works and ancillary works
• environmental mitigation, compensation and enhancement works, including for biodiversity net gain.

^{1 There are primarily two different types of substation - one uses air to insulate the electrical components (air insulated switchgear) and the other uses gas to insulate the electrical components (gas insulated switchgear). The decision on which type of substation we construct depends on several factors including availability of space, potential environmental impacts, cost, safety and maintenance requirements.}

You can view the proposals on our interactive map by following the link below. To learn more about the detail of what’s being proposed in your area, please see the ‘Our proposals’ chapter of the Project background document, which is available to download from our Document library.

Interactive map

What's happened so far?

Since the close of our non-statutory (June to July 2023) and localised non-statutory (July to August 2024) consultations, we have reviewed and carefully considered the feedback we received alongside the outcome of technical and environmental studies.

This has been used to inform the development of our preferred route alignment and proposed pylon positions, and has resulted in several changes to our proposals.

We are now seeking your feedback on our updated proposals, including where the new infrastructure could be built and what you would like us to consider as we further develop our proposals.

Proposed substations

The project would need to connect to two new substations – one at Creyke Beck in Cottingham, (known as Birkhill Wood substation) in the East Riding of Yorkshire and a new substation at High Marnham in Nottinghamshire (part of a project called ‘Brinsworth to High Marnham’).

Planning permission for these new 400 kV substations needs to be obtained from the relevant local planning authorities under the Town and Country Planning Act 1990. Separate public consultations have been held for each of these projects.

Consultation on proposals for a new gas insulated switchgear substation located approximately 700 metres to the north of the existing Creyke Beck substation was held in July 2023. A planning application is being submitted to East Riding of Yorkshire Council for the new Birkhill Wood substation in 2025. You can read more about the proposed new Birkhill Wood substation, previous consultation and latest updates on their project website here.

Consultation on the proposals for a new air insulated switchgear substation at High Marnham, Nottinghamshire, took place in April and May 2024 as part of a project called Brinsworth to High Marnham. A planning application will be submitted to Bassetlaw District Council for the new High Marnham substation in 2025. You can read more about the proposed new High Marnham substation, previous consultation on Brinsworth to High Marnham and latest updates on their project website here.

While the new substations did not form part of our proposals for North Humber to High Marnham during our non-statutory consultation, we have made the decision to include both substations within the statutory consultation for the North Humber to High Marnham project. This approach allows National Grid to demonstrate that the project can be delivered and that it can connect to the national transmission network.

The inclusion of the substations within the North Humber to High Marnham project does not change our intention to continue to progress with the separate planning applications for each substation, and it does not affect our continuing discussions and negotiations with relevant landowners and interested parties. We are committed to, and fully intend to pursue and deliver, the substations in line with relevant planning permissions and land agreements.