Updated: A1 clear following accident north of Stamford
Updated: Road is now clear.
Traffic is reported to be queuing for four miles on the A1 southbound following an accident this morning.
Traffic is backed up between B1174 (Grantham South / Little Ponton junction) and Easton.
One lane is closed following an incident in which a vehicle has overturned.
There are delays of at least 12 minutes.
Emergency services are on the scene for recovery work.