I'd be a hardliner on this.

In Ireland 30 years ago, carefree driving was acceptable. It isn't any more. Our road deaths have dropped enormously - not sure of the figures, but I think they may have actually halved. Of course, part of the reason for this is the enormous improvement in infrastructure, with motorways linking the main cities; another part is the NCT - if your car is over four years old, you have to bring it for a comprehensive check every year. (This is almost certainly about to put me off the road as a driver next week, unfortunately.)

Even if you're going only 10mph, drinking slows your reactions. All you need is for a picnicking family's child to toddle out on the road in front of you, and those slow reactions could cause a tragedy. All you need is a cyclist - perhaps also a drinker - to waver out in front of you and you could do something you'll regret all your life.