Location : The M1 southbound exit slip at junction J21 . Lane Closures : Lane one is closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 13:30 and 13:45 on 12 April 2022. Return To Normal : Normal traffic conditions are expected between 13:30 and 13:45 on 12 April 2022. Lanes Closed : There is one of three lanes closed.