I like the idea of if your driving you don’t drink that’s fine. I mean that’s what I do.
But what happens if you still have alcohol on your breath or in your blood from the night before. If they have a "no tolerance" policy you would be ******. I know people will say you shouldnt drink that much the night before blah blah but your body doesn’t always discharge alcohol at the same rate all the time so you could think and feel your fine and get screwed.
I was told that as a guide an adult male will process 1 unit of alcohol an hour and a women would process 1/2 unit an hour. Pending on height and size (I cant confirm if this is correct or not). Taking this into account you have 4 pints standard 2.0 units beer and have 8 hours sleep as a male you should be ok (of course if you body processes at the same rate when sleeping). But have 5 pints and drive for work the next morning you could be automatically banned seems crazy. But meh my example is really bad but thats my thinking behind why I think the new rules could be bad if put in place.
And getting rid of the second test at the station is crazy. I mean as unlikely as it was they have to ensure the results are the same or about right.