There are currently delays of around 35 minutes and queuing traffic on the M1 southbound between J10, M1 (Luton Airport Spur Road) and J9, A5 (Redbourn), because of an earlier broken down vehicle.
All lanes have been re-opened but congestion stretches back to J12, A5120 (Flitwick).
Heavy traffic has been reported on the A505 Dunstable Road in both directions in Luton at the A6 Telford Way junction.
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