Many moons ago I was asked by my Mum to see if I could help a friend of hers who had recently moved into a bungalow and was not able to get a kettle to work when plugged into one of her kitchen sockets. I went to see her and checked the voltage at the socket - 240 ish volts. Plugged in the kettle, which did not do anything, so off with the cover of the plug and plug in (carefully) again. Switch on and check volts. About 50 volts. AHAA must be a loose connexion in a JB somewhere. Concrete floors, after a look in the mounting box, looks like the wire goes straight up the wall , so wiring run in attic. Place a chair , remove hatch and pull myself up into the attic and swing around and sit on the edge of the hatch. Look around with the torch and about about a foot away from where I put my hands to get up there were. THREE 4 INCH NAILS banged into the wood with L,N and E wires twisted around them!!!!!!! Needless to say nobody knew by whom or when this was done. Perhaps in time this ‘connexion’ could have burned the house down.