The GWR introduced a sleeper wagon in 1894, and built more similar wagons in 1938 and 1942. Some of the later wagons were given wooden sides for use from the concrete works at Taunton. At least one with Churchward brake received full air braking. Cambrian make a 4mm model of these.
![DW100682 ZRW Taunton Concrete Diag T12 @ Woking 84-10-20 [2]](/img/s/v-10/p870505577-11.jpg)
