National Grid has announced that its work to lay underground cables through the Mendip Hills in Somerset as part of the connection of the Hinkley Point C nuclear plant to the transmission network is now 60 per cent complete. The 400,000-volt cables are being installed along an 8.5-kilometre route from Loxton in the south to Sandford in the north to avoid the use of overhead power lines in the Mendip Hills Area of Outstanding Natural Beauty.