Railbus derivatives In the 1980s, Leyland National bus components were also used to build a family of railbuses and multiple units for British Rail: LEV (Leyland Experimental Vehicle) railbuses Pacers Class 140 Class 141 Class 142 Super Sprinters Class 153 Class 155 Despite the best intentions, the front end of the Leyland National was not considered substantial enough to allow for a standard bus front end to be used on train carriages. The body was very similar to a National, the components used were identical but the configuration was to a different format. References External links National Vehicles introduced in 1972 Buses of the United Kingdom Step-entrance buses