OBone wrote:
I need to run several cables from my internal garage into my loft, but I
don't wish to run them up the outside of the house. The problem is running
them through a first floor dividing wall that is made from two pieces of
plasterboard that has an egg box type construction between them. How does
an electrician get over this problem when wiring in wall switches?


When in doubt rip it out...

Just remove a section of plasterboard from top to bottom, gouge out the
honeycomb to make a channel, and stick the plasterboard - or a new piece
- back. Skim, sand and paint.

I've tried all the other ways and they take longer in the end.

I do this almost EVERY time I have to install ANY thing electrical
here..stud and plasterboard..