Passengers on London buses could soon be receiving push notifications with real-time travel updates and in-app ads thanks to "the UK's largest iBeacon experience". A collaboration between mobile marketing company Proxama and Transport for London will allow integration of the beacon system into an app in what they catchily call a "utility-led consumer engagement experience". Beacons are small chips that use Bluetooth to connect to smart devices like phones and tablets to transmit messages or ads, much like a pop-up on a computer.