Ah, thanks folks. I'm not sure where I got that idea from then.
Perhaps I mistakenly thought it counted as a "new circuit" when I looked into stuff a few years ago.
We have had a few new circuits put in, but we got a real electrician in to do the relevant part p notifiable bits.
I have bought an extractor fan to go in my conservatory. It is a simple fan with a pull-cord and no run-on timer.
I want to wire it into my lighting circuit, but the installation manual insists on it having a 3a fused fan isolator switch.
I understand that a (not otherwise qualified)...