Indeed, the deaths caused by people having between 20 and 80 microgrammes of alcohol in 100ml of blood (the ones who would be covered by a rule change) might be minimal, but the current culture is that X is OK but Y is not, where X and Y vary wildly between people.
So you have idiots necking five pints, and then thinking that because they've had a meal to 'soak it up', they can drive home. The zero limit reinforces the fact that there should be a choice between consuming alcohol and driving.
Indeed, the deaths caused by people having between 20 and 80 microgrammes of alcohol in 100ml of blood (the ones who would be covered by a rule change) might be minimal, but the current culture is that X is OK but Y is not, where X and Y vary wildly between people.
So you have idiots necking five pints, and then thinking that because they've had a meal to 'soak it up', they can drive home. The zero limit reinforces the fact that there should be a choice between consuming alcohol and driving.