It is also worth noting that VOSA, unlike the Police do not need a search warrant. Someone I used to know operated a minibus for his care home business without an O licence. I did try to warn him, but he thought he knew best.
One morning VOSA visited him, went through all his books & gained all the evidence they needed to show in court that he had been operating a vehicle commercially for several years without an O licence. The guy was apparently in tears, as they also noticed he was involved in tax fraud & passed on that documentation.
Also, as someone who has shown they are willing to break the law. The chances of getting an O licence become slim. And the costs involved, in even applying for an O licence, are high.