RETAIL union Usdaw is calling for tight security to protect shopworkers from drunks as more stores apply for 24-hour drink licences.

The union is concerned that supermarkets may become flashpoints as drunken revellers try to buy alcohol, but are refused because they are intoxicated.

Usdaw General Secretary John Hannett said: "Our primary concern is the safety of our members so we will work closely with supermarkets to make sure that adequate security is in place where stores have a 24-hour licence."