Highways England say there are long delays on the M1 southbound.
Highways England said:
‘There are 40 minute delays on the approach to this M1 incident above usual journey times spanning 4 miles back towards J22. Average speeds on approach to the incident are less than 10 mph.
‘M1 southbound J21A to J21 has all lanes stopped due to a multiple vehicle collision.
‘Please expect long delays in the area and consider planning an alternate route when travelling.’