Ed Sirett wrote


You've got to be trolling! There is no way that routing an electric
cable through the builders opening behind the inset gas fire box can
be compliant!

Well, tell that to the manufacturers; in the void are mains cables

You are talking about a back boiler unit.
The OP is talking about "the cheapy inset things from B&Q, complete
with mantle piece,

I *did* wonder; and I thought my post made it clear that I wasn't quoting
scripture

"Safety, physical protection etc may be another matter,"

So I think the "trolling" crack was uncalled for, especially as I have
provenance here, more as an asker, admitted, but definitely not a troller.

And I treat you with the respect you deserve, which is a lot.


--

mike