When we moved in, there were two armoured cables that ran into separate rooms in the house, and then plugged in with a 13A socket, no RCD. There was no consumer unit (old fuse board), so no RCD protection there either. Each armoured cable ran to a plastic box in the garden, where 2 gang adaptors were used to plug different sets of lights in. One of the 2 gang adaptors was in a box full of water……
On top of that, there was an outside socket, which was actually an normal socket for use in the house, and with no specific IP rating. It had been put in a little wooden box with a hinge on it to keep it dry. To top it off, when I traced the wiring back it went back to the 32A supply for the oven.
It’s all been made good now, but I did wonder if I had some comeback against the previous owner, but I’m not sure if I could be bothered with the hassle. How he didn’t kill himself and his family I don’t know…..