Relaxation of drinking laws leads to an increase in violent crime and drink-driving, according to a study carried out by the University of the West of England. The report was based on studies of the effects of extending licensing hours in parts of Iceland, Europe, Australia and Canada. The report said: "Evidence exists of licensing liberalisation being followed by rises in alcohol consumption, violent crime, traffic accidents as well as extra public health and tourism costs." Martin Plant, co-author of the study, said that extending drinking hours would also cause a rise in absenteeism at work.