Previous methods for testing for alcohol use before the breathalyser involved officers using such scientific methods as asking drivers to stand on one leg, walking in a straight line or touching their noses with their eyes closed.
However road deaths from drink driving do still occur and accounted for around 200 fatalities last year, according to the
Final figures for 2015 show a 9% increase in the number of seriously injured casualties - from 1,070 in 2014 to 1,170 - the first rise since 2011. Worryingly, the total number of casualties in drink drive accidents for 2015 was 8,470 – up 3% on the previous year.
Police carried out over half a million (520,219) roadside breath tests in 2015, the lowest number since data collection began in 2002. More than 60,000 drivers (one in eight of those tested) failed or refused to take the test.
Men were twice as likely as women to fail a breath test, a trend that was consistent across all age groups according to the DfT.