Well the thing is, what are they expecting for this 16mins test?
If they just want you to verify that there is a passable Zs then 16mins is plenty, however if they want a belt and braces test of integrity then 16mins may be no where near enough time.
The other downside to this broadcasting of number of circuits per day malarkey is that unscrupulous ‘testing’ companies spring up and expect the same number of circuits tested per day without giving any consideration to traveling time between all the circuits, most domestic properties may have between 6-10 circuits so that’s at best 4 different properties to attend, familiarise yourself with, explain to customer etc etc. Is it any wonder why the good sparks are hammered when they’re having to compete not only against the unscrupulous but also those that are there to support us?????