Uber bookings more than treble in a year to nearly $11bn, says report

Controversial taxi app's revenues double every six months according to unverified investor report but profit figures still remain shrouded in secrecy

Uber's global bookings are projected to more than treble to $10.8bn (6.9bn) this year and reach $26.1bn the next, according to an investors' presentation that indicates a flotation for the ride-hailing business by 2017.

The taxi app, which operates in more than 50 countries, keeps 20% of booking revenue, according to the confidential slideshow, obtained by Reuters. Based on those figures, 2015 revenue would be around $2bn.