"When to stop" is the force's third crackdown on drunken behaviour

The three-month "When to stop" initiative aims to encourage people to drink only in moderation.

Drinkers will be warned to think about their behaviour and its consequences, and encouraged to have fun without breaking the law.

Underage drinkers and those who help youngsters obtain alcohol will also be targeted with a view to prosecution.

It is part of Chief Constable Mike Craik's pledge of total policing, and the force's third major crackdown on drunken behaviour.

Last year, "The party's over" and "Don't spoil the party" campaigns led to more than 8,000 arrests for offences of drunkenness, violence and disorder.

Assistant Chief Constable Sue Sim, in charge of operations, said: "We don't want to stop people enjoying themselves, but we do want to encourage them to drink in moderation.

"We're asking drinkers to think about their behaviour and its consequences. As well as the effect of their behaviour on others, people under the influence of alcohol make themselves vulnerable to violence or attack.

"Have fun but don't break the law."