light switch

I'd like to install a dimmer switch to control my lighting. I know you can get rotary dimmers like these: http://goo.gl/kuPhwq, which are the usual way to install this. Instead, I would like to use a 3 way retractive switch for dimming. I've seen 3 position retractive switch modules from...

So I have a light switch in a stud wall. I want to cut a door in the wall where the switch is and move the switch to the side. I know cables should run vertically. But my issue is I cant access the ceiling void without cutting a hole in the ceiling to move the cable over. Can you run the cable...

So I am in the process of getting one of the rooms in my house re-plasterd after it had damp remedial work done to it. Today I took down the existing light fitting that was in the room (was a wooden based 3 x ses swivel light with 3 x 5w SES LED candle bulbs) and I replaced it with a normal BC...