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Traffic is clearing after a bus broke down in one of the Dartford tunnels.
The vehicle broke down in the left-hand tunnel earlier, with both tunnels stopped briefly at around 7.30am.
This caused problems anti-clockwise on the M25 between J1a for Swanscombe and J31 for West Thurrock.
At its height queues were tailing back to J2 for the Darenth interchange, but all lanes have reopened.
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