From these seemingly diverse cities spot the odd one out: Barcelona, Spain; Buffalo, New York; Buenos Aires, Argentina; Vancouver, Canada; Frankfurt, Germany; Anchorage, Alaska; Austin, Texas; Oslo, Norway; Reykjavik, Iceland; London, England. Yes, you guessed it – London. The city voted many times as having the best cabbies, and with the most stringent taxi licensing regulations in the world has allowed Uber to operate with predictable consequences.