Associate
It's the hallway of my basement flat, I don't think it's a junction box, that picture is overexposed and doesn't show the hole in the middle of it. You can however see the dimple where the hole is in the second picture
I think it is an old ceiling light thing where you can dangle the wire through the middle, it looks the same as some of the live ceiling light things (sorry don't know what they're actually called)
Like a pull cord switch for bathrooms?