Overview

Pelham substation will be expanded in order to enable the delivery of two new quad booster units north east and south west of the site. Initial vegetation clearance has been undertaken to make way for the new quad boosters, with their arrival scheduled for early 2026. 

To facilitate new connections, the substation will also see some diversions, relocations and removals of existing OHL and towers. This has the capacity to tidy the current tower configuration around the site and improve some visual impacts. 

The arrival of the quad booster units in 2026 will require some road closures across a two-week period. The details of these will be agreed with the local highways authority and will seek to minimise day-to-day impacts as much as possible. The works undertaken fall within permitted development, rather than the remit of the consented 2014 DCO. 

As part of the works, we are looking at where improvements can be made to the natural landscape to enhance walking routes and deliver a minimum 10% biodiversity net gain. 

Timeline

February 2024 – Phase 1 vegetation clearance at Pelham substation

September 2024 - Phase 2 of vegetation clearance at Pelham substation

2025-2027 - Reconductoring of 4ZM line between Pelham and Waltham Cross 

2026 - Vegetation clearance and delivery of quad booster units to Pelham substation 
 

Address

Pelham Substation, Stocking Pelham , Bishop's Stortford, SG9
 

Community involvement

We are committed to engaging with communities to ensure the projects deliver other localised benefits, including social benefits via our Community Grant Programme and environmental benefits via biodiversity net gain (i.e., increasing biodiversity in the area we are operating in above what is currently there). 

The Community Grant Programme is run by the National Grid Electricity Transmission (NGET) business. The programme is aimed at community organisations and charities in areas where our work is impacting local people through our operations and construction activities.

Communities impacted by the maintenance of existing infrastructure (e.g. refurbishment of overhead lines or substations resulting in road closures and other impacts) can apply for grants of up to £10,000.

You can read more about the Community Grant Programme here: https://www.nationalgrid.com/responsibility/community/community-grant-programme.