• building approximately 18 km of new 400 kV overhead line
• building approximately 11 km of new 400 kV underground cable
• removing around 27 km of existing 132 kV and 400kV overhead line between Burstall Bridge and Twinstead Tee
• building a new grid supply point substation at Butler’s Wood
• ancillary works to support construction of the project, such as temporary construction compounds, site offices and haul roads
• works to deliver a minimum of 10% biodiversity net gain, including planting and other environmental enhancements.

You can view the detailed plans included in our application for development consent by visiting the Planning Inspectorate's website here.

Current works

Over the past few months, we have been carrying out preparatory works at the site of the main construction compound. The main construction compound will be used throughout the construction phase for site offices and the delivery and storage of materials. Once construction of the project is complete, the compound will be removed and the site restored to a condition suitable for return to its original use.

From the start of July, you may notice more activity at the compound site as preparatory works continue. Upcoming works, which will be carried out by Balfour Beatty on behalf of National Grid, will include:

• July: Creation of a bellmouth (road junction) to allow safe access to and from the site, along with associated signage
• July – early September: Removal of topsoil and delivery of stone, which will form the surface of the compound
• August – September: Delivery and fit-out of modular site office and worker facilities, including drainage and ducting.

Dates are based on current programme and subject to change.

At the peak of works, we expect up to 60 vehicle movements per day to and from the compound site. Our approved working hours are 7am-7pm (Mon-Fri) and 8am-5pm (Sat, Sun and bank holidays), but we do not expect this phase of work to take place at the weekend or on bank holidays. 

We will look to minimise disruption wherever possible and are sorry for any inconvenience caused whilst the works are carried out. Should any work be delayed or take longer than planned due to factors outside our control such as adverse weather, updates will be shared here on our website. Thank you for your patience while the works take place.

Surveys

If a survey cannot take place on the scheduled date (due to factors such as poor weather conditions), we will endeavour to reschedule the survey in a timely manner.

Access to land plots is agreed before any surveys take place. If you are a landowner and have questions about surveys on your land, please get in touch via your usual point of contact or the details at the bottom of the page.

Upcoming works

We expect to start construction work on the rest of the project later in 2025. This is likely to include:

• creating temporary construction roads and accesses to reduce construction traffic on the local road network
• delivery of a second supergrid transformer to the grid supply point substation site
• the start of a temporary outage on the existing 132 kV overhead line
• continuation of pre-construction environmental and archaeological surveys.