Curious

We took a fabulous walk to Canty Bay following the beach round to where there's an abandoned modern building on the cliff near Tantallon Castle.

I couldnt help myself and had to check out the deserted building.

I think maybe it may have been some kind of power station, but I'd love to know what it was used for as its proving very difficlut to find out any information about it on the internet.

If any one has any ideas?