This tennis court is in the grounds of a Manor House that was originally built in 1888 and used as a hunting lodge. Over the years many families have called this place home, and most recently it was used as a luxury wedding venue. Unfortunately an electrical fault caused a fire a few years ago which ripped through the property, and it has been abandoned ever since. I’ve made a video of my explore along with a few other places if you’re interested. No pressure of course! Video - u/TheGhostTrail
I imagine it would be more slippery and if the moss is growing on concrete that might make it more dangerous.