No, it's quite a secretive hobby with people reluctant to give away locations, due to the amount of wankers who like to burn places, spray them or vandalize them.
Ah of course, I didn't think about that.
Just read your linked post, thanks. Definitely something to think about. I'm trying to get a bit fitter as I'm really horribly out of shape and overweight, maybe something like this will help. That or it'll finish me off, but at least I'd have fun on the way, lol. It's more motivating than a boring walk anyway!
It helps to be fit and skinny, though I am neither. There is some climbing involved if you are determined to get into places.
Last Sunday I was flat on my belly scrambling under a gate, delicately trying to maneuver in an old mansion with little floor left (a ten-foot drop awaited me if I slipped), and climbing through a stairwell as someone had barred the door leaving me little options.
Other places, you can walk right in unhindered. These are the ones you might want to look for initially.