Asking the question: does it meet BS 7671 (the 18th Edition IET Wiring Regulations)?
This one looks quite innocent…
…until you realise where it leads… (pun intended) 😉
This one went <BOOM>!
This was was found basically in this state but with wires connected under the floorboards and a whisper away from some copper central-heating pipes…
Room 7609 