That's a shame.
And the crack looks a bit worrying and so does the fact that some of the stone work is now 'hanging' on the fallen wall.
Unfortunately without any maintained preservation of these type of sites this is likely to become an increasing scene
😞
I went in a mine once.... it was dark and scary..... full of weirdos
When do I get my soapbox, I need to rant on about some b***cks