M25 and A1(M) congestion causing long delays

M25 congestion is causing delays near Potters Bar and South Mimms, while there is also queuing traffic on the A1(M).

The M25 is slow clockwise between Junction 23 for South Mimms and 25 for Enfield because of a broken down vehicle, with delays expected to last until about 10.30am.

On the A1(M) northbound, the slip road for Tesco at Junction 4 also has traffic tailing back to the Hatfield Tunnel.