National Grid has been granted planning permission for a £400 million upgrade of its transmission network in North Yorkshire. Energy secretary Claire Coutinho has signed off on the development consent order application for the Yorkshire Green project, paving the way for construction to begin this summer. The project includes the installation of a new 400kV substation extension at Monk Fryston, a new 275kV substation at Overton, and 6.4km of overhead lines – 2.8km at 400kV and 3.6km at 275kV – to connect existing overhead lines to the new Overton substation.