National Grid has announced plans for a major electricity infrastructure upgrade in Port Talbot to power Tata Steel’s new electric arc furnace (EAF) and strengthen energy capacity across South Wales.
The Margam Connection Project includes the expansion of the existing Margam substation with a new 275kV gas-insulated substation (GIS), and a second GIS facility at the Tata Steel site connected via underground cable. Both sites will be built using SF6-free switchgear technology, reducing the project’s environmental footprint.
A public information event will take place on Thursday 17 July, from 2pm to 8pm, at Margam Community Centre, Bertha Road, Port Talbot, ahead of a 28-day statutory pre-application consultation.
Richard Gott, project director at National Grid Electricity Transmission, said the upgrade will help deliver a cleaner, more secure energy future for South Wales. “By enabling the electrification of Tata Steel’s operations, we’re not only supporting the UK’s transition to green steel but also helping to safeguard jobs and strengthen the local economy,” he said. “We look forward to engaging with the community and hearing their views.”
Construction will be delivered in partnership with Laing O’Rourke, using pioneering technology that replaces sulphur hexafluoride (SF6)—a commonly used but potent greenhouse gas—with lower-impact alternatives.
Peter Lyons, managing director for Laing O’Rourke’s Europe hub, said the firm was proud to continue its partnership with National Grid. “This project is another fantastic example of how we’re helping to deliver cleaner and more secure energy for the UK,” he said. “Through early collaboration, we’ve worked together on the design and implementation programme, and National Grid has valued both our unique operating model and our technical expertise.”
National Grid is planning £35 billion of transmission network investment across Wales and England between 2026 and 2031 to connect clean power sources, electrify industry, and support national economic growth.
