Is it a game-changer - giving the public a better service - or just unfair competition? The app-based taxi company Uber has sharply divided opinion since it hit the streets. In Brighton and Hove it's licensed for 39 cabs - but rival taxi companies say Uber brings in many MORE vehicles from outside the city. And they're demanding full public scrutiny of its operations before its licence is renewed. Uber says it's doing nothing wrong and customers value its service, as Malcolm Shaw reports.