"PhilÅ" wrote:

I take it I now have to connect the lighting ring to the RCB??

You should have taken all the feeds to the bathroom fan from a single
circuit, I'm pretty sure your wiring contravenes the IEE regs and, as
you've discovered, it doesn't work either!

--
Chris Green

Chris

If I take them from the mains ring (common) then this contravenes IEE is
dangerous, as the lighting ring could be switched off and the light live, so
I am to take it all from the lighting ring...

Yes, I think that's the normal way of doing things, all from the
lighting circuit.

--
Chris Green