Hi. Am new to this forum and i have an urgent question. Have a 2 plug socket in the bedroom and want to plug into one side of it an upright extension lead holding 4 plugs from a hifi stack system and one from an electric heater, making 5 plugs in the lead. Is this safe to do? Can one socket and lead take the requirements of these appliances? Not to be impatient but i need an answer asap as the hifi is on the bed and i'm gonna have to pull a bookshelf away from the socket to get access before i need to go bed. Thanks.