Questions about the Knowledge
47 questions candidates ask, each answered in a few lines from TfL's own documents, with the detail and the sources underneath.
Checked against TfL's documents on 3 October 2026.
Who can do the Knowledge
- How old do you have to be to be a London taxi driver?
- What driving licence do I need to do the Knowledge?
- Can I do the Knowledge with points on my licence?
- Can I be a London taxi driver with a criminal record?
- Can I be a taxi driver with a drink-driving conviction?
- Do you have to be British to be a London taxi driver?
- Do London taxi drivers need an English test?
- Can you do the Knowledge with dyslexia or a disability?
- Can I be a taxi driver if I have lived abroad?
Applying to TfL
What it costs
Medical and background checks
The stages
- How long does the Knowledge take?
- How many runs are in the Blue Book?
- Is the Knowledge self-assessment compulsory?
- What is the Knowledge written exam?
- What happens if I fail the Knowledge written exam?
- Do I need a moped to do the Knowledge?
- How long do you have for each stage of the Knowledge?
- Where are Knowledge appearances held?
- What happens if I miss a Knowledge appearance?
Appearances and marking
Suburban and the yellow badge
After you pass
Learn the Knowledge with TheLTK
Every run and point, a plan for each day, and your calls checked turn by turn.