I used to work for Vosa and was a Vic tester among other things.
The actual test and testing method is not supposed to be seen if you go by the book.
We used to take them into our SVA building which was cloaed to the public.

It was always made clear that exactly what was tested and how should never be public knowledge, and in order to complete the Vic tests you have to sign official secrets act documentation to enforce this. Thats the main reason im reluctant to give out too much information about the testing procedure.

The moment the test is public, and people know what is tested and how, means that people will start to work around it and it looses its value. Thats the reason that Vosa dont want the test public knowledge, so people dont ever really know how or what they check and test.