My Lords, I will speak briefly to the evidence. An analysis was done in Switzerland comparing both novice and experienced drivers who had been fatally or seriously injured, and whether they had been drinking alcohol. The analysis compared two time periods, before and after reducing the legal limits, for 2011 to 2013 and 2014-15. In between-time, the limits in Switzerland were reduced to 20 milligrams for novices and 50 milligrams for others. The study found a larger reduction of serious alcohol-related accidents in both groups of drivers than of accidents without alcohol between the two time periods.
Early trends from Scotland with respect to the impact on fatal accidents of reducing the drink-driving blood alcohol levels to the same levels in December 2014 are also very promising. In 2010, the North report published by the Government reviewed drink and drug-driving laws, and modelled that a lower limit of 50 milligrams of alcohol in 100 millilitres of blood would save a significant number of lives. Applying those models to Scotland suggested that between three and 17 fewer deaths per year could be expected. The good news is that there seems to be a trend of that happening. In 2015, the first full year in which the reduced limit was in place, there were 24 fewer fatal accidents, a 13% reduction, and 98 fewer accidents involving serious injury—a 5% reduction.
As the noble Baroness said, it is difficult to attribute causation conclusively. However, is there really any reason why the results found in other countries should not also apply here? I strongly support a reduction in these limits to the same levels that apply in other UK jurisdictions. We must not forget that in May this year, your Lordships’ House also voted to support this reduction, anticipating that this could save as many as 100 lives a year. The measure is supported by a significant majority of the public.