The fourth lane is closed on the M1 Southbound this morning (20/10) between J12 and J11A.
National Highways Traffic Officers are on scene assisting.
National Highways say this incident is currently causing approx. 7 miles of congestion on the M1 southbound between J13 and J11A.
The delays are adding at least 45 minutes to normal journey times.
UPDATE 8:50AM- Incident has been cleared and traffic has returned to normal.