The M1 is currently closed southbound between J15 Northampton and J14 Milton Keynes due to a collision just prior to junction 14 which has resulted in the involved lorry leaving the carriageway and catching fire.
Emergency services are on scene have been been dealing with two HGV that have been in collision.
UPDATE:The results of driving after using cannabis on M1. One driver very lucky to be alive. Arrested after positive drug wipe. Quick way to lose your job, licence & possibly life