Much as I love all your elegant scientific and statistical theories a few facts are the most salient.
There where as few as 160 requests for detection use in 2015.
Detection evidence has never been used in a prosecution for licence evasion.
The stated reason for this was that it was only used to obtain search warrants, however no case of a search warrant being used as a result of detection evidence is known.
In other words it is not detection itself that is the virus its the threat of detection.
What I find amazing is that the British state can go on pretending that there is some kind of technolicy out there that nobody knows ab