A renewable energy firm has submitted plans to build a new underground hydro power station deep within a Scottish mountain.
Bosses at Drax said plans have been submitted to expand their existing Cruachan Power Station to increase the total amount of energy the site can produce to 1.04 GigaWatts.
To achieve that, around two million tonnes of rock would need to be excavated to create the cavern, tunnels and other parts of the new power station.
