Traffic is moving very slowly through Potters Bar with bus companies warning of delayed services after an earlier incident on the M25.
At about 4.30pm, Herts County Council was warning of delays of up to 70 minutes between the B556 Mutton Lane to Junction 24 of the M25 in Potters Bar.
The county council warned of continuing issues on the M25.
Eyewitnesses described seeing Herts Police at the scene on the M25, helping move the traffic along.
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