Reports are just coming in that a crash involving multiple vehicles on the A1 near Colsterworth southbound is causing traffic problems.
A passenger in a car has reported to have seen ‘two lorries and a few cars’ involved in the collision, which has blocked both lanes.
More details as we get them.
Update: The A1 is shut between Grantham and Colsterworth. The northbound carriageway is open but traffic is slow. A diversion has been set up.