Lincolnshire Police are urging motorists to avoid the A1 in the Grantham area.

The warning comes as they have closed the northbound lane following a collision this afternoon at the A52 Grantham North/Barrowby turn off.

Traffic is queuing from Grantham to Newark as emergency services deal with the incident.

AA Roadwatch has just reported: "Severe delays of 37 minutes and delays increasing on A1 Northbound between Tollemache Road North and A52 (Grantham North / Barrowby Turn Off). Average speed five mph."