That might be so but why put down for a cover what the manufacturers fit. I can not see the logic in this at allwell put.
advisories can be issued year after year and the car often dies with them still as an advisory. these days its just a case of any tester covering there back and they mean very little.
you can have such a thing as a dangerous advisory which is an item that is considered dangerous BUT is not part of the test an example of this would be an insecure roof box - its not on the test and doesnt prevent the test from taking place yet it could quite easily fall off and injure a pedestrian.