Two vehicles have overturned on the A1(M).

Emergency services have been called to the southbound carriageway of the A1(M) between South Mimms for the M25 (j23) and Borehamwood.

Two lanes are currently shut.

There are severe delays in the area.

Traffic is queuing southbound from j3 for Hatfield and northbound on from the Rowley Lane slip road in Borehamwood.

It has also had a knock-on affect on the M25.

Anti-clockwise, it is busy from j24 at Potters Bar and clockwise, delays are starting to reach all the way back to j21A for the M1.