Our proposals 

We propose a series of works to build and operate three new substations – one near Brinsworth, another near Chesterfield and a third in High Marnham – to allow us to safely carry more energy between the North of England and the Midlands.   

The proposed substations would also enable us to upgrade the existing Brinsworth to Chesterfield and Chesterfield to High Marnham overhead electricity lines and connect future electricity transmission network projects as part of The Great Grid Upgrade.


We propose to build and operate a new 400 kV substation to the east of Long Lane near Brinsworth in Rotherham, South Yorkshire.

We need to build a new substation as there isn’t sufficient space to accommodate the additional equipment at the existing Brinsworth substation, off West Bawtry Road. 

We expect it will be an air insulated switchgear (AIS) 400 kV substation as the proposed site has sufficient space to accommodate an AIS – which has a greater footprint than a gas insulated switchgear (GIS) substation.

The new substation would be within a compound approximately 380 metres x 200 metres - the size of around 11 football pitches – and include approximately 12 bays, network stability equipment, standard substation plant and control infrastructure. 

The highest structures within the substation compound would be six overhead line gantries, which are bridge-like structures with platforms used to support equipment and cabling. At approximately 12 metres, they would be the highest structures within the substation compound. The site's footprint has the potential for some future expansion if required.

Field and pylon in Rotherham
Dog walker next to pylons

We also propose temporary diversions of the existing Brinsworth to Thorpe Marsh and Brinsworth to Chesterfield overhead lines, with temporary pylons during construction. We expect these temporary diversions to be in place for less than six months. We’ll include details when we submit our planning application.

To turn the overhead line into the new substation, we’d need to build nine new pylons and remove nine old pylons—four to the south and five to the north.

Substation sunset


Learn more 

Submit your feedback

We value your input as we develop our plans – feedback from local communities and stakeholders will play an important part and help shape our plans ahead of the planning applications.

To provide feedback on our Brinsworth proposals you can: 

  • Complete an online feedback form

  •  Email your comments to: [email protected]

  • Call us on freephone 0800 073 1047 between 9am and 5.30pm

  • Post your written responses or printed feedback form to: FREEPOST National Grid Projects (JBP) (no stamp or additional address information required)

If you’d like help submitting your feedback or require a feedback form in another format, please contact our Community Relations Team.

We must receive your comments by 11.59pm on Monday 17 June 2024.

Brinsworth face-to face events:







Friday 7 June 2024

Saturday 8 June 2024

2 – 7pm

9am – 2pm

Brinsworth online webinar: 

Webinar session



Brinsworth  proposals

Wednesday 12 June 2024

6 – 7pm


Register for the webinar or call our Community Relations Team on 0800 073 1047 or email [email protected] to book.

National Grid partners with Met Office to boost capacity on the electricity transmission network - electricity transmission pylon and overhead lines at dusk

Get in touch

Do you have questions about the project? Or would you like to register your interest for us to keep in touch? Contact our Community Relations Team:

Email:[email protected]

Freephone:0800 073 1047 Monday to Friday 9am-5:30pm (An answering service is in place outside of these times)

Write to us: FREEPOST National Grid Projects (JBP) (no stamp or additional address information required)

You can also register your details to receive email updates on the project.

Register your email  

If you think our proposals could affect your land, please contact the Brinsworth to High Marnham Land Referencing Team at Ardent. You can call 0203 693 2500 or email [email protected]. Alternatively, you can write to Ardent, 36-38 Botolph Lane, London, EC3R 8DE.