These wagons were built from 1937, beginning with a batch of 25 wagons. 30 more followed in 1943, and 50 in 1945. The later ones had different buffers. The kit includes all three types of buffers: as built the first batch had SECR-type buffers, later ones had unusual Bulleid ones with rectangular buffer head spindles. The wagons were used to transport new rails which meant that they travelled to/from Workington or Scunthorpe. In BR days the wagons were used to transport used rail panels and sometimes other items, such as bridge girders. With "one-piece" diamond-framed bogies.

The picture above shows a wagon fitted with "Bulleid" buffers. The lashing rings are separate mouldings that can be put on as shown or upwards if chains are attached to them to secure a load.