Crash on the A1(M) in Welwyn Hatfield

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

There has been a crash on the A1(M) in Welwyn Hatfield district.

The accident took place on the southbound side between junctions four and two and has closed a lane.

Traffic is expected to return to normal by 9am.