A motorcylist has captured footage of a car travelling along a west London road with a man sprawled across the bonnet in what police believe is a road rage attack.

The motorcyclist, who runs a YouTube channel called Mr Short Rider, filmed the car on the A4 near Brentford on Sunday afternoon.

When he caught up with the driver of the silver Mercedes there was no sign of the man who had been sprawled across the front of the car. When the biker asked what what was going on the driver said he didn't care and swore about the man who he claimed had been blocking the road.

The Mercedes was also spotted by officers in an umarked police car.

Police said the victim in his 30s was driven for a few hundred yards towards Chiswick. He was taken to hospital for treatment but later discharged.

Officers are still trying to find the Mercedes driver.