More drivers than ever before have been breath tested during an All-Wales Summer Drink-Drive Campaign, but less than five per cent were found to be over the legal limit. Over 12,000 drivers were breath tested by the four Welsh forces in the campaign, which ran from June 1 to June 30 - this compares to 7,970 in 2007. Of these, 4.2 per cent proved positive, which compares to five per cent the previous year. The percentage of drivers giving a positive test after collisions was 6.5 per cent. The number of under 25s breath tested was 3,635, with 353 positive, refused or failed to provide which equates to 4.2 per cent. In Dyfed Powys Police, one of those arrested was just 15 and found to be over the legal limit. Deputy Chief Constable of Dyfed Powys Police, Andy Edwards, said: "It is pleasing that the percentage of positive tests has fallen. "What is concerning is the number of people found to be over the legal drink-drive limit following collisions. This clearly demonstrates the serious risk they are putting themselves and others at. "All the Welsh forces target drink driving throughout the year and our message is simple - if you drink, don't drive."