The Department for Transport does not hold this information centrally.
Responsibility for licensing taxi drivers rests with local licensing authorities outside London and Transport for London in London. The relevant legislation requires them to determine whether an applicant for a taxi driver licence is a ‘fit and proper’ person to hold a licence. As part of this process, it is standard procedure to request a disclosure from the Criminal Records Bureau. The authority will then decide whether any information contained in the disclosure means that the applicant should not be granted a licence.
Under the Notifiable Occupations Scheme, when an individual comes to the notice of the police and identifies their occupation as a taxi driver, the police should notify the appropriate licensing authority of convictions and any other relevant information that indicates that a person poses a risk to public safety. It would then be for the licensing authority to decide whether to revoke or suspend the licence.