A crash between two cars and a tanker in the Hatfield tunnel is causing tailbacks.
Police were called at 7.25am to reports of a crash in the Hatfield Tunnel southbound.
Three vehicles were involved – a silver and green tanker, a white Mercedes Sprinter, and a black Ford Focus.
There were no injuries.
There are delays along Mount Pleasant Lane and the Great North Road (A414) after the collision.
Traffic is at a standstill near Junction four of the A1(M) and is moving slowly at Junction three.
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