whoever told you that is wrong.
the electricity goes 'out' on the live and 'returns' on the neutral
they both carry current.
a live earth reversal refers to the live and earth (which should not normally carry current) you are talking about the live and neutral (which do)
from the consumer unit to the shed there is only one cable which leeds to a double socket,
it is just used to plug in the jet washer for the car
one day it was not working
i used one of the plug testers and on the diagram it says its a live/earth reverse
also opened the socket up,
with a fluke T100 tester found that between the earth and live 230 volts and the same between the earth and neutral
i cant see how this has happened, have spoke to someone who said its the live and neutral have joined in the cable, so any ideas of the cause would be a great help before i did up garden
if your live and neutral join together you have a dead short and it will blow a fuse or trip an MCB. most likely thing off the top of my head is a neutral has come adrift bihind a faceplate somewhere or in the consumer unit.