Violent assaults and drink-driving have increased in countries where drinking laws have been relaxed, a report has claimed.

The report, by a professor from the University of the West of England, was based on studies on the effects of extending licensing hours in parts of Europe, Australia and Canada.

It found that relaxed laws in Iceland had led to an 80% increase in drink-driving and a rise in hospital admissions, while in Ireland there was an increase in disorder, drunkenness and injury.

The findings of the report will be another blow to the government which is facing increased pressure from the police, senior judges and MPs to rethink extending licensing hours from November.