Most of the walls in my house are rubble stone and lime mortar.
Unsurprisingly the lime mortar is too soft to hold a caple clip.
Unfortunately the stone is far too hard, the nail doesn't even scratch
the surface before bending over.

The only solution I can see at the moment is to put all the wire in
conduit which is screwed to the wall (they are drillable) and then
plaster over the conduit.

Anybody got any other cheaper/easier/quicker ideas?

Please, no mentions of Part P, I know all about it and I have a
friendly NAPIT registered electrician who will inspect and provide an
installation certificate!

Fash