About 10 years ago I went out to a lighting fault on a rental property. When I got there I found an old wooden re-wireable fuse board, VIR cable..., The lighting fuse had blown. The cable looked in very poor condition so I decided to do a quick visual inspection throughout the property. There was no floor covering down on the landing area and I could see exposed cables in the gaps of some floor boards. So I decided to pull up a long board which had evidence of being up before. As a I pulled up the board I could smell and hear the flow of gas.
Some idiot had nailed the floor board down through the main lead gas pipe along its length - around half a dozen nail holes. In addition the VIR cables had perished, conductors exposed and were draped over the lead pipe, trapped between the floor board, pipe and joists.
I have never seen anything like it before or since. This was a rental property and the tenant was a young woman with 2 toddlers!
It gave me nightmares, to think what could have happened.
Hasten to say, we got it re-wired pretty sharpish!