Regarding PAT testers virsus Medical Electrical tester.
(Thanks to Mike IET)

In my considered opinion, if these items were tested with a conventional appliance tester, then inadequate testing would have been carried out.
The basis for this is that Medical Electrical Testers resolve leakage currents down to below 10uA and use a RC network to simulate human tissue. So, the tests carried out by a 'PAT' tester are probably inappropriate.

I agree with the above conclusion.

Barney