The layout is this..I'm working in a flat that is joined to the main house.The flat has its own consumer unit which feeds the shower although the bathroom ceiling light is powered from the main house.From this light which has a pull cord switch runs an extractor on a timer,it has an isolator switch outside the bathroom.I'd like advice and help please on the best way to have the light/fan switch outside the bathroom instead of a pull switch inside. Regards to all....