Hi,
Just purchase a (humidity controlled) fan to fit in the bathroom (probably in Zone3/outside zones depending on height).
Requires the usual perm.live, sw live and Neutral. I was initially going to take the L,N and SW L from the bathroom light fitting via a 3 pole sw fitted near the bathrom ceiling(outside zones, I know ideally it would be outside the bathroom but I don't envisage anyone touching it under normal circumstances).
The installation instructions, however seem to suggest (but not insist) that the fan is powered by a 3amp FCU.
I could do this (I'm not sure is a 3amp fuse would necessarily descriminate between a 6 amp MCB anyway? I guess it might) but it complicates matters as, even if fiited a 3A fused FCU between light fitting and fan I'd need to run a new sw live (fused at 3A presumably). I guess I could swap the existing light sw for a double pole switch and use that to provide a second sw live (from the 3A FCU) but I don't want to unless its actually neccessary.
Many Thanks
Jim