On Thu, 12 Apr 2007 09:54:40 +0100, "Mike Smith"
mused:

Thanks to all who have replied. I must admit that I assumed
that a "normal" light switch should not be installed in a
bathroom. Even if this is legit, would it be regarded as
best practice?

Legit, yes, best practice, debateable. I wouldn't unless there was a
really really god reason to put the switch in the bathroom, anywhere.

I'm worried that it might not get passed by a picky BCO (I'm
replacing the entire bathroom suite so the work is
notifiable).

If it's in zone 3 then technically it passes so he can be as picky as
he wants to be, it still passes, technically.

I'd like to avoid the hassle of chopping thru the ceiling
to gain access to fit a pull-cord switch as it would be
beyond my competence to re-plaster everything afterwards
(trust me on this ;-)

Why would you need to replaster?

Finally, can anyone advise as to where to obtain an IP
rated switch suitable for indoor use, or am I on a fools
errand looking for one?

Can't say as I've ever seen an IP rated switch. Your other option may
be to use a low voltage retractive switch operating some sort of home
automation type switch either in the box the other side of the wall or
behind the light fitting.
--
Regards,
Stuart.