The Marines haven't launched a pilot program but will begin breath testing in April.

WSJ: Navy, Marines to Require Breath Tests

Random breath-testing is the norm across Australia, and the maximum breath alcohol is lower than in Britain.

BBC: The amber nectar

"The present findings further support the value of breath-testing as a screening tool, " they say.

BBC: 'Promising results' for bowel cancer breath-test

North Wales Police carried out the highest number of breath tests at 18, 780, with 107 people testing positive, failing or refusing.

BBC: Festive drink-drive numbers drop in Wales

Police tested 27, 744 motorists in Wales as part of last year's campaign, with 545 (2%) testing positive or failing or refusing to take a breath test.

BBC: Drink-driving: Cardiff, Swansea in top 10 problem areas