The carnage that can happen should it go horribly wrong

It was a shocking example of the consequences of a driver using a mobile phone - captured in graphic detail by a camera in the cab of a lorry.

Trucker Tomasz Kroker, from Andover, had been casually trying to tune in to his favourite music. Seconds later his lorry smashed into the back of a car on the A34, killing four people - a mother and three children.

The images caused nationwide condemnation, but tragically did little to ram home the message that it is unacceptable to use a mobile while at the wheel.

From today drivers face new, tougher penalties and police forces across the south have launched a crackdown.

Our reporter Kerry Swain has been out with police in Dorset to see if the penalties will be enough to persuade motorists to change their ways.