There are calls for a national database of taxi drivers after 5 live Investigates discover some drivers are still operating - despite having their licences refused or revoked. Local authorities who are responsible for issuing licences currently don't share information. This means that if a council has refused or revoked a driver's licence, it won't necssarily be picked up by another local authority when that driver applies there. This means that predatory and sometimes dangerous drivers are still able to carry passengers. The Local Government Association and Dame Vera Baird - chair of the Association of Police and Crime Commissioners - are now calling for a national database which they say would protect passengers.