Shocking footage has emerged from London, UK, of a cyclist shouting at a bus driver after he allegedly caught him using his phone while driving.

The video, shot on Sunday, shows the driver, apparently with the smart phone in his hand, talking back to the angry cyclist, as they both head down Ludgate Hill.

The cyclist later alleged online: ''As the bus drives past me I see that he is holding his phone in the left hand, so I approach the bus and realise he had his betting app on the phone.

''He said there was traffic and he could not drive anywhere and he continued moving the bus forward."