TfL's position
TfL's health and wellbeing page encourages drivers to look after their mental health and to seek medical help. It says that in most cases, where a driver seeks help and has treatment, it is unlikely to take licensing action.
How fitness is decided
Every applicant must meet the DVLA Group 2 standard, assessed by a doctor with your full records. TfL's documents do not list conditions that rule a driver out; where a case is not clear, its occupational medical adviser decides, and you can send further evidence.
If your health changes while you are on the Knowledge, or you start medication that could affect driving, tell TfL straight away. Telling them early is far better than it coming to light later.
Sources
- TfL, Health and wellbeing for taxi and private hire drivers, Mental health
- TfL, Taxi and private hire driver policy, version 6.0, 1 September 2026, sections 3.6.1 and 3.6.2
From the guide: How to become a London taxi driver