UPDATED: Several miles of tailbacks which is affecting traffic
The A1 between Stamford and Wansford is now fully open following an collision involving several vehicles
The southbound carriageway was partially blocked with queueing traffic for several miles due to a 'multi-vehicle accident' at the Green Drift (Barnack Turn Off) in Wittering.
There was congestion to the Wothorpe/Easton On The Hill junction.
Cambridgeshire Police reported that the collision had possibly involved six vehicles.
There is still heavy fog across the area.