All joking apart, and based on practicalities, as what happened to me was my downstairs lights all failed one night. I checked all connections at the Consumer Unit and found them all to be tight. I removed two wall switches and saw that there must be a joint box or three terminal ceiling roses used but there were no three terminal ceiling roses in the installation. So where are the joints? Wiring was from the upstairs down to the ground floor switches, so the joint box/boxes had to be below the upstairs floor boards. I lifted the fitted carpet at one end of the long landing and found no sign of floor boards that had been marked to indicated where the joint box/boxes were. At last, I discovered the Octopus joint box system had been used. So all switch cables and ceiling point cables terminated in that box. It was, in effect a "Marshalling" box.
Upon opening the box I saw that the Gas Board electrician who installed the mains connected smoke detectors during the upgrade of the heating system from warm air to combi-boiler had connected his live feed under the connecting brass plate that joined all the switch feeds and the main feed for the circuit. But he had placed the copper at an angle over the existing coppers. The plate that clamped the six copper feeds was not making an effective pressure on all the coppers as a result. I assume that the coppers were seated in grooves in the octopus joint box. I tried to unscrew the brass 2BA or 4mm terminal screw but it was solid and it gave up till the next time. Since then the downstairs lights have never even flickered but I will go back and strip out the octopus box and use some other type of multi connecting method. I am trying to decide which method to use - terminal strips linked out, Wago's, solder the bloody coppers or whatever. Ideas please.
I give you all of this detail so that you will realise that joint boxes below wooden floors as a method of splitting the line conductor is very bad practice.
Suggestions welcome. Not prepared to move home!