I've always said energy storage is about more than just batteries, although of course they dominate the present roll out and news pages.  This looks like a great CEAS (Compressed Air) project to be deployed in Northern Ireland. I hope it gets underway and proves to be commercial. There are a large number of salt caverns in Cheshire and many other places in the UK that could be put to good use for utility scale energy storage. Not sure why they chose a robot voice for the animation though!