Before a licence is granted the applicant must satisfy the Public Carriage Office that:

• he/she is a fit and proper person to hold a licence
• he/she is medically fit
• he/she has attained the age of 21 years
• he/she has held a full driver's licence (not a provisional licence) granted to the applicant under Part III of the Road Traffic Act 1972 authorising him/her to drive a motor car for at least 12 months prior to the date of the application
• he/she must pass a police criminality check carried out by the Criminal Records Bureau (CRB) to ensure safety to the public.

Contact Transport for London for more information.