Angry driver caught punching fellow motorist in dashcam footage

Footage of a shocking road rage incident in Southend, Essex, has emerged showing the moment a driver punches another motorist in traffic.

It's unclear what provoked the attack. Early in the video a Vauxhall Corsa can be seen tailgating a BMW 3-Series, before overtaking and swerving in front of it. The black hatchback then moves across the road to block the saloon multiple times.