Overview

National Grid is building a new electricity substation (‘Uxbridge Moor’) on land bordering our existing substation in Iver.

This is needed to connect several customers to our electricity network to the west of London.
The national electricity network has recently seen a significant increase in demand for electricity. In the Iver area a large number of organisations have requested new power connections from National Grid and, as a regulated business, we have a legal obligation to meet these requests. The Uxbridge Moor substation will help us do that.

In September 2025 we started mobilisation and early site preparation works for the construction of the new substation.  The initial stage of work will focus on the construction of the new access roads shown in pink and green on the map below.  These activities mark the start of a major investment to meet future power demands across the region and support a more resilient, lower-carbon electricity network.

Construction is expected to continue through to 2029.  We will do everything possible to minimise disruption during construction, particularly considering other planned developments in the surrounding area.

• Working hours will be Monday–Friday, 7am–6pm and Saturday 7am–1pm
• Our team may be on-site outside these times for safe setup and pack-down, but no noisy or disruptive work will take place outside those hours
• Local neighbours may notice increased noise and vehicle movements, but we will seek to keep these to a minimum
• Heavy good vehicle (HGV) transport routes are agreed in advance and are carefully monitored to ensure contractors are correctly following them.  They are focused on the strategic road network, not smaller local roads
• HGV movements on the public highway will be timed outside peak periods (limited to operate between 10am and 4pm)
• We will keep neighbours informed of any planned changes affecting access or parking.