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National Grid will begin upgrading the underground electricity network in Port Talbot on March 9, with work planned between the Briton Ferry and Ynys Street substations. The project is expected to take 9 to 12 months, depending on ground conditions.

A rolling road system will be implemented to limit disruption, affecting short sections of the route at a time. Residents and businesses may need to move vehicles from specific areas temporarily. This upgrade follows previous works to support Tata Steel's new electric arc furnace and aims to improve power reliability in the area.