Here is the full statement from National Highways: “The M1 is closed southbound between Junction 11A (Chalton) and Junction 11 (Luton) following a multi-vehicle collision.
“The incident occurred shortly before 8:45pm this evening. One of the HGVs involved has overturned and come to rest on its side. There is also significant damage to the nearside barrier and boundary fencing, along with a substantial oil spillage across most lanes.
“Traffic that was caught within the closure has now been released past the scene via lane 4. Bedfordshire Police and other emergency services remain in attendance. National Highways Traffic Officers are also on scene assisting with traffic management.
“The carriageway will remain closed while emergency services complete their response, followed by vehicle recovery, barrier repairs and carriageway clean-up.”