Police are catching more "morning after" drink-drivers, according to latest figures.
The number of people arrested for drink-driving between 6am and 8am rose nearly 4% between 2011 and 2012, police statistics published by car insurance company LV= showed.
A further LV= survey of 1,688 drivers showed that 3% had driven while over the legal limit the morning after a drinking session in the last two years.
The arrest figures were obtained under a Freedom of Information Act request and were based on replies from 22 of the 45 British police constabularies.
Of the police forces that gave information, Thames Valley had the most drink-drivers caught in 2011 and 2012 - a total of 4,783. Thames Valley has also recorded the highest number for the year to early November of 2,095.
The "drunkest" driver of 2013 so far has been a motorist arrested by Bedfordshire Police who was eight times over the legal limit.
The LV= survey showed that 46% of drivers underestimated, or did not know how long, it took for alcohol to leave the body, while 30% of men and 19% of women admitted to having driven at least once after a heavy drinking session the night before.