Measuring Ze - what to disconnect?

We often come across VIR loops. such that the looped property has no earth and never had one.
It seems more common than one would think.

(it's amazing the number that do not know we have no obligation to provide an earth in these cases - but often do)
Hasn't this come about as a result of PME with DNO supplied "earth" being sold as the best thing since AC current ? Coupled with the lack of knowledge of "earths" and "bonds" that some electricians demonstrate today.
 

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