The final stages of the project still need to be carried out, as we aim to complete these works in 2025, which are subject to network outages and wider factors, such as bird nesting seasons.

Maintenance work on transmission lines is carried out on one side of the overhead lines and then the other, in a loop. This means we will be returning to some of the same areas that you may have seen us working in before.  

When completed, the new conductors will be capable of carrying slightly more power, helping transport cleaner, greener energy from where it is generated to homes and businesses. 

Further information around any planned work will be shared on this webpage. 

What we have done so far 

Over the past year, we have completed environmental and technical surveys to help us prepare for this work. Maintenance activities have been carried out on sections of the route. These included: 

• Refurbishment of overhead lines 

• Steelwork repairs on pylons 

• Replacing fittings to ensure the line's reliability 

What’s next? 

The final phase of work will involve replacing sections of the existing wires (also known as conductors), which are nearing the end of their life, between Twinstead Tee and Rayleigh Substation. We will also be refurbishing other parts of the line infrastructure, including steel work.  

This work will require planned outages, which are scheduled power line interruptions to allow safe maintenance and upgrades to be carried out across the network. These outages will not affect power to your home. 

As part of this work, you can expect to see: 

• Access routes being established 

• Delivery and construction of scaffolding at work sites 

• Linespeople working at height to replace overhead wires 

• Repairs to pylon steelwork 

• Temporary closure of some local parking spaces 

• Vegetation clearance 

Our working hours will typically be 7am to 7pm Monday to Friday and 7am to 4pm on weekends. Where weekend work is required, we will notify you in advance. 

Keeping you informed 

We will update this website as we carry out the rest of the project to let you know where you might see our team working.  For some areas, updates will be provided via post before we start our work. If you have any questions, you can get in touch with the team by calling 0808 304 1534 or by emailing [email protected]. 

Thank you for your patience as we work to ensure a reliable, greener electricity supply for homes and businesses. 

National Grid's Community Grant Programme 

Our Community Grant Programme is aimed at organisations and charities in areas where National Grid’s work impacts local people through our operations and site activities. 

We fund projects run by charities and community groups that meet local community needs, by providing a range of social, economic and environmental benefits. 

Find out more