Accident on A1(M) between Stevenage and Welwyn

The A1(M) has been shut on the northbound carriageway near Junction 4 for Hatfield. Picture: Archant

The A1(M) has been shut on the northbound carriageway near Junction 4 for Hatfield. Picture: Archant - Credit: Archant

An accident on A1(M) affecting northbound and southbound traffic.

A crash has caused queuing traffic on the A1(M) from J8 A602 (Stevenage / Hitchin) to J6 B197 Welwyn By Pass Road (Welwyn / Welwyn Garden City).