Delays, road closed and queueing traffic due to accident investigation work on M25 clockwise between J3 M20 / A20 (Swanley Interchange) and J5 M26 / A21. Following an accident shortly before 10:30 a full closure was put in from J3 at 10:50.
The road is expected to remain closed until 17.00 at the earliest. Delays on approach to the closure and also on surrounding roads.
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The 22 year old man is seriously injured in hospital. Police believe a baseball bat and iron bar may have been used in the attack