M1 diversion route in full as road closed northbound between junction 20 and 21Motorists have been told to allow extra time for their journeys due to the closureView Image Traffic being diverted off the M1 this afternoon (Image: Traffic cameras / Highways England)Diversion routes are in place as the M1 remains closed northbound this afternoon (Tuesday, September 23) after the southbound side reopened just before 3pm. ‌National Highways reported at 12.50pm today: "The M1 in Leicestershire is CLOSED in both directions between J20 (Lutterworth) and J21 (M69, Leicester) due to a serious collision. Full diversion route as M1 closed northbound:Northbound diverted traffic is advised to follow the hollow square diversion symbol:Exit the M1 northbound at Junction 20 and take the first exist (west) onto the A4303. At the Interchange take the fifth exit onto the M69 northbound. Continue along the M69 northbound for approximately 14.5kms to M69 Junction 2/M1 Junction 20 and rejoin the M1 Northbound