Claiming to be a communications platform rather than a taxi service, Uber has expanded by ignoring existing rules. This has prompted protests against the ride-hailing company by drivers, run-ins with national authorities, and new laws designed to curb its activities. The decision by Transport for London to strip Uber of its licence last week was the latest in a long line of clashes between the US firm and the establishment.
In some cities around the world where it operates, Uber is on a collision course with regulators, while in others it remains firmly outlawed. In several places, however, the $70bn (£52bn) firm is actively negotiating its return – or already back up and running.