The action came after a survey by Trading Standards North West about underage drinking habits.

The campaign targeted retailers and involved "secret shoppers" who attempted to get served alcohol.

In the summer, 25% of attempts resulted in successful purchases, which dropped to 12% over the winter, mirroring a similar trend for the region.

Head of Cumbria Trading Standards, Phil Ashcroft, said: "Our results in the summer forced retailers to think again about their approach to underage sales and I am delighted that they have responded positively.

"We will be keeping up the pressure on them to further eliminate the sale of alcohol and other restricted goods to children."