A1(M) reopens after 'significant defect' fixed

The defect on the A1(M) was first identified on 21 March

A "significant defect" has been fixed on the A1(M) in Hertfordshire.

National Highways said the northbound stretch of the road between the Welwyn and Stevenage junctions reopened at about 06:00 GMT.

It had been closed since 21:00 on Thursday for repairs to be carried it.

The 5m (16ft) dip was identified after 45 core-probe tests were carried out and a design solution organised to fill the 4m-wide (13ft) void and to resurface the road.

The road was now open "following the works to repair the road due to a significant defect", it said on social media.

Lane two of the southbound section was also shut from Thursday night until Friday morning.