It seems that 43 out of 45000 drivers were able to drive illegally - it's bad, but not a horrific. Is there a time line available? Was this is in one year or overall since Uber's existance?
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London is not an easy place to drive, and many of those passengers would have been vulnerable: lone females, people who had too much to drink, etc.
You might not consider it horrific, but by London standards it is completely unacceptable.