A U.K. supermarket chain is going high-tech in order to prevent youths from illegally purchasing alcohol and tobacco, the BBC reported May 13.

The Budgens chain says that face-recognition cameras will be used in a London store to identify customers under age 18. The system will alert cashiers when a buyer previously identified as being underage tries to make a purchase of alcohol or cigarettes. Cameras have been installed at all three checkout lanes at the store.

The system also identifies customers previously identified as being old enough to make a purchase, speeding up transactions, the company said.