Wiring behind skirting boards
could be easier than a channel in plaster
or drilling holes in floor joists,
but how to do it?

http://wiki.diyfaq.org.uk/index.php/Rewiring_Tips
says: "Wiring can be run in modified wooden skirting board incorporating sheet steel between wood and cable."

Easy to cut a rough horizantal channel in the plaster or brick or stone behind the skirting, but what kind of steel could cover it? Isn't an RCD good enough to protect it?

Andy why shouldn't I replace the existing 1970's sockets
which are in the skirting board?

http://wiki.diyfaq.org.uk/index.php/...lush_with_wall)
says
"Decide where you need your socket,
bearing in mind that they should not be placed on skirting boards or in bathrooms."

george