Seems no-one knows the answer to ceiling void question, but thanks for the 47 who had a look at it. On a related subject how much wattage can be put through a single gang switch? Would it take 400w. Currently there is a double gang with only one cable serving 160w of lights + an extractor fan. Previous house owner or sparky appears to have put in some form of loop to allow two circuits.
Any ideas?
Any ideas?