Sarah Hall Drivers in Norfolk were this morning warned to watch out for black ice on the county's roads.A temperature drop overnight made driving conditions tricky and Norfolk police were called to a string of road crashes.

Sarah Hall

Drivers in Norfolk were this morning warned to watch out for black ice on the county's roads.

A temperature drop overnight made driving conditions tricky and Norfolk police were called to a string of road crashes.

A spokesman for the force said by 8.15am they had been called to eight crashes and urged drivers to take extra care.