Mayor of London Sadiq Khan said in a statement: "I fully support TfL's decision - it would be wrong if TfL continued to license Uber if there is any way that this could pose a threat to Londoners' safety and security."
General secretary of the Licensed Taxi Drivers' Association Steve McNamara said: "The mayor has made the right call not to re-license Uber.
"We expect Uber will again embark on a spurious legal challenge against the mayor and TfL, and we will urge the court to uphold this decision.
"This immoral company has no place on London's streets."
Uber has 21 days to appeal.
The current licence expires on 30 September but Uber has 21 days to appeal and can continue to operate until that process expires.
http://www.bbc.co.uk/news/uk-england-41358640