Number range 391002 - 391082 Converted between 1990 & 1993 by ABB Crewe & RFS Doncaster
Number range 391101 - 391160 Converted 1995 by Toton C. & W.
Number range 391201 - 391698 Converted between 1996 & 2004 by Marcroft / Tees C.&W, Barry Island / RFS Doncaster

These wagons were created by adding a box body onto redundant HEA Hopper Wagon chassis.