We have the same thing here, Andrewman, if you’re convicted you can have a device put in your car that won’t start unless the driver provides a sample.If you elect to have it fitted, it negates the year ban, not a bad idea, methinks.
I see what Moggy and Ren Frew are driving at (no pun intended) but I guess my opinion is biased quite heavily by the nature of my job.
Again, a good thread……