As from July this year all vehicles, except mopeds, will be required to carry a self-breathaliser kit as law. I don't see the point, or am I missing something here?
In my view, the responsible driver won't drink & drive, therefor has no need of the kit, on the other hand, the irresponsible driver will still drink & drive, probably won't even consider blowing into the thing. If he/she did & it showed that they are over the limit do you really think that it would stop them?
In my part of France (Dordogne) it is so common to see people getting into their little sans permis cars totally inebriated, probably too drunk to remember that they now have a new obligation to prove that they are bladdered before they turn the key!