Qualifications improve your chances; they do not gate the job. Level 0 is the most recognised.
Pay range: National Careers Service.
Your route in
You can start without qualifications - direct entry/volunteering; a qualification improves your chances
Add-on certificates
Complements to the main route. Where no level is shown, the awarding body does not specify one.
Where this can take you
If you're employed by a larger taxi firm, you could become a supervisor or manager in the dispatch control room. You could also move into taxi licensing with a local authority. As a self-employed driver, you could become a taxi operator and increase your earnings by running a private hire firm, employing other drivers. You could also move into chauffeur work, either employed by a company offering chauffeuring services or direct employment with a private client.