These were rebuilt in 1978-9 from Bolster D's. About 1250 wagons were given Y25 bogies & new bolsters.
These were of two types — the kit has those fitted to the later wagons, although the bolsters on the earlier 500 are fairly easy to make.
Choice of lever or handwheel braking. Y25 bogies.
These wagons were also used as Departmental vehicles, coded YAA "Brill".
These kits do not include wheels & bearings
