The M25 anticlockwise is blocked with stationary traffic and long delays between J30 A13 (Lakeside / Tilbury) and J29 A127 (Romford), congestion to J1a A282 / A206 Crossways Boulevard / B3228 (Swanscombe).
A second air ambulance is attending the accident on the clockwise side and there are long delays whilst all traffic is held anticlockwise.
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After a mostly dry start, cloud will continue to thicken with some showery rain likely this afternoon. Highs of 18 deg C (64 deg F).
Tributes have been pouring in for a woman who died in a house fire in West Norfolk.
Any residual evening showers should die out. Clear spells at first, and turning chilly in places. Lows of 9 deg C (48 deg F).