Murphy has been awarded the largest substation project currently underway in the UK, following a multimillion-pound contract win from National Grid Electricity Transmission (NGET).

The project involves the construction of a major new substation at Uxbridge Moor in Buckinghamshire, adjacent to NGET’s existing Iver substation.

The new infrastructure is set to play a key role in meeting the growing demand for electricity in west London and will enable new customers to be connected to the national grid.

Leveraging its in-house capabilities and direct delivery model, Murphy will carry out the full range of works. This includes the construction of both a 400kV and a 132kV substation, underground cabling, ancillary buildings, and modification works to the existing 400kV overhead line network. The 132kV substation will be connected via underground cables.


The project also includes major civil works, such as the development of a 1.2km raised access road from the A412 and a new road bridge over the River Alder Bourne, further enhancing site accessibility.

A key feature of the project is its use of gas-insulated substation technology, which allows for a significantly smaller site footprint—up to 70% less than a conventional substation. This will help minimise environmental impact and disruption to the surrounding area.

Liam Corr, Managing Director of Energy at Murphy, said: "Since 1951 Murphy has been a leading provider of innovative and integrated energy solutions – today we support groundbreaking transmission and distribution projects across the four countries in which we work.

"We are proud to be delivering this project in the UK’s capital and building on our strong working relationship with National Grid to help to ensure energy security for decades to come."