"Toby" wrote in message
...
You have to install an isolator switch for it, these are generally
installed outside the bathroom - If you have a fan that has a built in
timer and is activated by the lights, then you need a three pole isolator
like this
http://www.tlc-direct.co.uk/Products/MKK4859.html

It will switch Neutral, permanent and switched live.

With this, you can simply install a timed fan (an/or a humidistat) and
turn this switch off when you just want lights and no fan, for the
midnight relief.

If the fan is just a simple fan without a timer, or their PIR model
(assuming this doesn't need a connection to the light switch as well as a
permanent supply) and you want intendant control, then you just need a
normal switched fuse spur like this
http://www.tlc-direct.co.uk/Products/MKK1040.html

The fan instructions will specify what fuse rating it requires, if that
matches what your lighting circuit is protected with, then you won't need
to install an extra fused spur like this if you choose the timed type with
a fan isolator switch.
http://www.tlc-direct.co.uk/Products/MKK0337.html


--
Toby...
Remove pants to reply


Many Thanks
Thomas