The police will start breathalysing UK motorists in the morning as well as the night during this summer.
The move is part of a month-long anti-drink-drive campaign designed to tackle morning-after drink-driving and drug-drivers.
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As part of the campaign, the Association of Chief Police Officers (Acpo) says police officers will carry out breathalyser tests at all times of the day, including first thing in the morning.
A similar campaign was run by Acpo through June last year, when 88,629 people were stopped and breathalysed by police, 6.1 per cent of which either tested positive or refused the test.
The Chief Inspector for Roads Policing in South Yorkshire, Stuart Walne, commented:
"With a four day weekend to celebrate the Queen's Jubilee, closely followed by the start of Euro 2012, the number of people drinking in pubs and at home is likely to increase and therefore the temptation to drink and drive is also likely to go up."
The campaign is also likely motivated by the recent surge in the number of motorists who drive over the legal drink-drive limit the day after drinking.
Research from 2010 found that the number of UK motorists driving above the limit the morning after they stopped drinking had increased by 30 per cent since 2003.
Acpo also reports that in 2010, 250 people in the UK were killed in drink-drive accidents and a further 9,700 people were injured in incidents involving a driver above the drink-drive limit.
At present the minimum punishment in the UK for a drink-driving or drug-driving offence is a 12 month driving ban along with three penalty points on a driving licence and a fine.