A new study, to be published in the journal Addiction, has examined how young people consume often large amounts of alcohol before going for a night out in town and city centres, and how those drinking before going out are more likely to be involved in alcohol-related violence.

As part of the study undertaken by LJMU’s Centre for Public Health, 380 individuals between the ages of 18 and 35 were interviewed to find out: their typical consumption of alcohol before going out in bars and clubs; their consumption while in bars and clubs; and the health and judicial consequences relating to their home and city centre drinking.

Key findings include:

• More than half of those interviewed usually drink at their own or a friend's home before leaving for a night's drinking in a town or city centre.
• On average, women consumed over a third of their total amount of alcohol before leaving home. Men consumed approximately a quarter of their nightly total before leaving home for their night out.
• On average, males and females consumed more than the recommended weekly maximum for an individual's alcohol consumption (21 units for a man and 14 units for a woman) in a single night out. Those who drank at home were four times more likely to consume over 20 units on a night out.
• Those who drank at home were also two and half times more likely to have been in a fight when going out in the last 12 months.

The authors conclude that the vast differences in prices of alcohol between off- and on- licence sales are contributing to individuals’ increasingly consuming alcohol at home in order to cut costs. This in turn can result in people being drunk in residential areas before going out, alcohol-related problems on transport into town and city centres, and individuals arriving in town and city centres already inebriated and consequently more likely to suffer from alcohol-related accidents or involvement in alcohol-related violence.

Karen Hughes, who led the study, said: "Much pressure is being placed on bars and nightclubs to prevent sales of alcohol to drunk people, manage customer behaviour and reduce alcohol-related crime and disorder in nightlife. However, if people are already drunk on cheap alcohol before they reach town and city centres this can represent an unfair burden on on-licensed premises to tackle problems stemming from alcohol purchased elsewhere.

"The vast price discrepancies between alcohol purchased in on- and off- licensed premises needs to be addressed to prevent drunkenness simply being displaced to residential areas. This is particularly important given extended opening hours introduced through the Licensing Act 2003, which mean nights out can now last longer yet spending money to fund a night out remains unchanged."

Professor Mark Bellis, co-author and Director of the Centre for Public Health, said: "While a lot of consideration has been given to managing alcohol sales in city centre bars and clubs, very little has been done to reduce sometimes ridiculously cheap sales in off-licences and supermarkets. Cheap off-licence alcohol encourages individuals to drink at home before going out. This results in town and city centres seeing drunker individuals who are more likely to be involved in problems like violence. The price of alcohol should not be decided by only industry profits and tax revenue but must be influenced by public health considerations. Such considerations support increasing the price of alcohol in off-licences and supermarkets."