Hello I have a single light switch in my bedroom .and I have a walk in cloths storage area , of which I want to put in a light. I have run a 1.5mm twin and earth cable to the existing switch and I want to use a double light switch so I can put either lights on . The single light switch has only one cable going to it .How can I wire up the double light switch to make this work ..Thanks for any advice ..
Wilson