National Grid has given an update on the £400m Yorkshire GREEN project, with a series of major construction milestones hit.

The Yorkshire Green Energy Enablement Project, referred to as Yorkshire GREEN, involves the upgrade and reinforcement of the high-voltage electricity  network in Yorkshire to improve the transfer of clean energy across the country. It is part of The Great Grid Upgrade, the largest overhaul of the electricity network in a generation.

Since main construction started in January 2025 the project has seen construction starting on new substations at Overton and Monk Fryston, installation of 28 new permanent pylons and 35 kilometres of new overhead electricity lines. 

In addition, eight 200 tonne supergrid transformers were successfully delivered and installed, marking a key step towards strengthening the region’s electricity network.

During 2026 work is ongoing at the Overton and Monk Fryston substations, while minor upgrade works at Osbaldwick Substation are expected to be completed during the summer.

Across the route, the installation of new pylons and overhead lines is progressing between Shipton and Overton, with this section due to be completed later this year before connection into the new Overton Substation. Between Overton and Moor Monkton, work is continuing to build new infrastructure, dismantle old lines and begin the removal of temporary pylons.

Further north, between Monk Fryston and Lumby, construction of new permanent pylons and overhead lines is continuing alongside the removal of older infrastructure around the Monk Fryston Substation site.

As major works are completed, reinstatement activity is now beginning, helping to restore land along the route. National Grid will also carry out work to leave the local environment and wildlife habitat in a 10% better condition than they were found. The new infrastructure will start to become operational in 2027, with all works and reinstatement anticipated to be completed in 2028.