For kit 21, the following sheet may also be utilised: MMT060 BR/SR VentilatedVans F&U (NGS Kit 21)(2600).
Also of interest, for possible additional markings for Society kits (NB some now o/o/s):
MMT066 'Shark' Eng Brake Vans (yellow&white)(2666) (kit 22);
MMT068 BR 21t&24½t Steel Mineral Wgns F&U (2608) (kit 19);
MMT070 BR Steel Ore & Sand Tipplers F&U (2610) (kit 64)
MMT076 BR 'Shocvans',Open Shock&Cattle Wgns (2616) (kit 36);
MMT09A Shock Vans & Shock Wagons 1948-80s (2681) (kit 36)
MMT084 BR Banana, Gunpowder, Palvans F (2624) (kit 13)
MMT565 BR 21t HTO & HOP Hoppers (2682) (kit 16);
MMT568 BR 21t Hoppers diag.1/146 bauxite F (2683) (kit 19).
The following sheets can be used for lettering PECO kits (NB ditto):
MMT061 for kit KNR-207 16T Mineral Wagon;
MMT068 for kit KNR-252 BR 24T Mineral Wagon;
MMT067 for kits KNR-254, KNR-255 and KNR-256 Loco Coal Wagons.
MMT553 is suitable for Osborn's Models' LMS CCT kit.