Dartford tunnel left bore closed after collision on the M25 in Kent

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The Dartford Tunnel on the M25 has been closed after a road traffic collision has left two lanes heading Anti Clockwise between J1A / Dartford Tunnel and J31 blocked.
There are long delays on the approach stretching back to Junction three M20 Swanley Interchange.

Emergency services have been called to the incident that has seen the closure of the left bore of the tunnel

More to follow