Police say to find alternative routes.
UPDATE 16:41
Leicestershire Police has said that the collision took place just after 12 pm (23 September) and involved a blue BMW 5 Series and a red Ford Mondeo.
The BMW collided with the Mondeo before leaving the carriageway and hitting a tree.
No one from the Mondeo was injured.
The BMW driver has been taken to hospital and is undergoing treatment for injuries.
Enquiries at the scene are ongoing, and motorists are being advised to avoid the area.
UPDATE 15:04
The southbound carriageway has been reopened.
The northbound remains closed.
#M1 #Leicestershire remains closed northbound between J20 (#Lutterworth) & J21 (#M69, #Leicester) following a serious collision.
— National Highways: East Midlands (@HighwaysEMIDS) September 23, 2025
Traffic on the southbound carriageway has been released & all lanes have re-opened.
Collision investigations are ongoing.https://t.co/RAvRVC5VCB pic.twitter.com/YmeV1H5d3w
The M1 is closed in both directions between J20 (Lutterworth) and J21 (M69/Leicester) due to a serious collision.
National Highways has said that all emergency services are at the scene.
The police are asking that people find alternative routes.
The #M1 in #Leicestershire is CLOSED in both directions between J20 (#Lutterworth) and J21 (#M69, #Leicester due to a serious collision.
— National Highways: East Midlands (@HighwaysEMIDS) September 23, 2025
All emergency services are attending the scene.
More information to follow shortly. pic.twitter.com/nzVRdz3qS2
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