The M25 clockwise carriageway has been closed after a vehicle burst into flames.
The motorway is closed between junction 25 near Enfield and junction 26 in Waltham Abbey.
Journey times are being hit by severe delays.
It is hoped that the road will re-open by 2.30pm.
Update 3.25pm: All lanes have now re-opened.
Delays remain back to junction 24, Potters Bar.
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