I have an interior bathroom which has always been damp. I want to try and do something about it and am thinking of getting a wall mounted continuous flow dehumidifier and attaching the drain pipe either into the toilet tank (easiest) or into the sink drain pipe (bit trickier), but I'm not sure how I can provide power to the dehumidifier. Obviously I don't have any sockets in the bathroom, and it only has light/fan that use electricity at the moment. I want to put the dehumidifier above the toilet which would mean it would be on the wall about 1m from the bath/shower and directly to the left and above the sink.
So my question is what is the simplest least disruptive way to get power to the dehumidifier? Can I drill a hole in the wall and feed the cable through and into the lounge and plug it in there?
Do I need to take any special precautions to make the dehumidifier legal in terms of electricity in the bathroom?
I live in the UK, as that will probably make a difference.