Association kit 2-561 for the BR cattle wagon, plus 2-363 for the 11'6" DC underframe, produce the W8 cattle wagon of 1914.
Modifications to the end will produce W5.
Similar modifications to the end plus use of alternative chassis (together with the door conversion from 2-363) will produce will produce W1.
Other later variants are also possible, subject to minor differences in wheelbase.
Also includes the later conversions to Fruit and Ale wagons.