Hi,

We're just in the process of having a gas fire replaced with one of the
cheapy inset things from B&Q, complete with mantle piece, etc. Whilst its
all apart I would like to put in a cable run from one side of the chimney
breast to the other to give us flexibility to move the tv around.

How hot would it get behind the gas fire if I say drilled a hole in both
sides of the chimney a laid a piece of plastic waste pipe in there to push
cables through. Or would I be better putting the cable run under
floorboards?

Si