Just had a phone call of a friend in a panic because his electric has gone off. He says all MCBs and main switches are still in the on position an nothing has tripped. He's just had a new born so didnt want to leave him in the **** so i went to have a look. He has a pre pay meter which he is adamant had money left on it. I took the DB cover off and checked for voltage at the main switch Live-Earth 240v, Neutral-Earth 240v?, Live-Neutral nothing! Initially I thought maybe the main fuse had gone but finding a supply at the main switch ruled that out. Is it likely to be a fault within the pre pay meter or have I missed somthing really simple?