There is heavy traffic at the Dartford Tunnel due to a succession of breakdowns.
The left-hand tunnel has been blocked at least four times this morning, starting with a broken down bus at 7am.
It has led to severe delays on the M25 Dartford Tunnel anticlockwise between junction 1A / A226 (Erith/Swanscombe) and junction 31 A1306 (West Thurrock).
There is also further congestion on the M25 junction 3 at the Swanley Interchange.
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