Drax given green light for new £500 million underground pumped storage hydro plant - Drax UK
www.drax.com
Renewable energy leader Drax Group has secured development consent from the Scottish Government for its ground-breaking plans to build a new c.£500m underground pumped storage hydro plant at its existing Cruachan facility in Argyll.

I initially posted a news article, but then found the primary source so deleted the article and posted the source instead. Sorry if you saw both!