The M1 motorway is closed near Luton airport following a multi-vehicle crash that authorities say has produced an oil spill. Police close the road as the incident is handled and specialist cleanup is required due to contamination on the carriageway. Both outlets report that the crash involves multiple vehicles and that an oil spill is present at the scene. The reports describe the motorway as partially closed, with traffic disruption continuing while emergency services respond and the affected area is made safe. Motorists are advised to expect significant delays and diversion measures around the Luton area. The situation is managed by police and other emergency agencies, with cleanup operations continuing to address the spilled oil. No further details on injuries, the number of vehicles involved, or the cause of the crash are included in the provided reports.