Drink driving The UK currently has one of the highest blood alcohol limits for driving in the world, at 80mg of alcohol per 100ml of blood. Most European countries have a limit of 50mg. Drivers with a blood alcohol level of 50-80mg are 2-2.5 times more likely to crash than those with no alcohol in their blood, and up to six times more likely to be involved in a fatal collision. Scotland recently reduced its limit and they have already seen an improvement in road safety. Lowering the limit in England and Wales could save up to 100 lives a year and £300 million in costs to emergency services.