J1A for A206
J31 for A1306
M25 Kent - Two lanes closed, queuing traffic and long delays on M25 Dartford Tunnel anticlockwise between J1a, A206 (Erith) and J31, A1306 (West Thurrock), because of traffic management. Diversion in operation - for overheight vehicles. Congestion to J3, M20 (Swanley Interchange).