Then, last October, Uber lost a landmark employment tribunal which ruled that its drivers should be classed as workers, rather than as self-employed.
The ruling, which Uber is appealing, could leave the company open to claims from its drivers, who are not entitled to holiday pay, pensions or working time controls.
The capital city of Tehran is a surprisingly modern city with many museums, palaces and bazaars.
The National Jewels Treasury includes a jewel-encrusted 200-year old throne and the worlds largest pink square-cut diamond.
Questions have also been raised about whether pressure on Uber drivers to maximise their earnings is leading to them lending their vehicles to other drivers — so passengers have no idea who may be driving them home late at night.