This was my point, really - i.e. what would they do from the
bureaucratic perspective with a certificate? Simply accept it, take
your money and rubber stamp the paperwork or get somebody else to come
and inspect?

They'd probably get hopelessly confused.

A switched on, but naughty, BCO might add you to his list of possible
timesavers and stop inspecting in detail after the 2nd or 3rd acceptable
inspection.

Christian.