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More than half of motorists act more aggressively behind the wheel than they do elsewhere, according to new research.

A survey of 2,005 adults for Churchill Insurance found that 31% admit to swearing at strangers while in their car, but only 12% do so face to face.

Psychologist Donna Dawson said "We feel the car is a safe place to express anger and frustration".

She added: "Our cars are the second frontier, our second skin or protective bubble where we can treat people like objects."

This clip is originally from 5 live breakfast on Friday 8 April 2016.