Illegal sales of alcohol in Derbyshire have fallen by almost 20 per cent.
A total of 147 checks have been carried out by Trading Standards officers since last April, with 15 premises caught serving underage children.
The 10.2 per cent failure rate is the lowest for three years.
Between 2004 and 2009 the failure rate ranged from 23 per cent to 31.5 per cent.
In the 2012-13 financial year, penalty notices were issued to 11 individuals caught breaking the law, two members of sales staff were cautioned and another two were issued with letters of warning.
Seven firms were issued with warning letters.
Derbyshire County Council’s deputy cabinet member for health and communities, Coun Ellie Wilcox, said: “Derbyshire’s licenced traders continue to remain vigilant against underage drinking.
“Underage alcohol sales present a serious threat to public health as well as public order, and the potential penalties of making underage sales are simply not worth the risk.
“Underage drinking is not something we take lightly.”