Computerised ID scanners have been installed in eight pubs and clubs in the city centre in the run up to Christmas.
The scanners quickly identify fake IDs and any troublemakers who are already banned from licensed premises.
Police and venues can electronically update and share photos and details of known offenders through the devices. Some of the £28,000 partnership project was funded from money seized from criminals under the Proceeds of Crime Act
David Zinzan, the Deputy Chief Constable of Devon and Cornwall Police talks about the force's campaign against alcohol-related violence over Christmas.
Devon and Cornwall Police have begun a poster campaign to get people to think about how drinking could affect their behaviour this Christmas. They say there's a dramatic increase in alcohol-related violence during the festive season.