On 14/04/2014 22:43, robgraham wrote:
I'm about to run a mains feed to my garden which because of the configuration of everything will run extensively through the attic space (single storey cottage).

You're not thatched are you?

If you are you have to put everything in steel pipes. Not even the
flexible ones. (this is why we have exactly one wire in our loft, for
the smoke detector)

Andy