What have I taken out of context?
You asked why someone thought that isolation as defined in BS7671 applied to domestic electrical installations, and I pointed out that BS7671 applies to domestic electrical installations, and highlighted the relevant parts of its scope.
taking a post from a different thread and posting it here - tut tut.
It does indicate your overall thinking though - namely taken a Reg for one thing and erroneously applying it to another thing just to prove to yourself that you are right. such desperation....