Pile-up causing severe delays heading southbound from Milton Keynes and Luton on M1
Highways England reports smash involving "several vehicles" near to Junction 9
Drivers face severe delays heading south on the M1 from Milton Keynes and Luton after a pile-up early on Tuesday morning.
Highways England is reporting a crash involving "several vehicles" which is blocking the outside lane between Junction 10 and Junction 9 for Redbourn.
Sensors showed traffic tailing back six miles at 7am.
A spokesman for the agency said: "Our Traffic Officers are en route to the collision."