Blocked - the M25 near Potters Bar (Image: Highways England)
A "jackknifed" lorry has caused major disruption on the M25 near Waltham Abbey.
Long delays are stretching back to the Essex town and journey times exceeding 30 minutes.
This is as a lorry has partially blocked the M25 anti-clockwise at Potters Bar.
One lane remains closed and the exit slip road is partially blocked.
An average speed of ten mph between Potters Bar and Waltham Abbey has been reported by AA as a result.
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