This tank wagon consisted of a tanker mounted on a four-wheel chassis. The tanker had a manhole with hatch on the top, bracing in two places around the tanker, mounted on an underframe.
It was white with the the red letters UD, for United Diaries creamery, milk bottling and distribution company, stencilled on the side.
The tank was slightly larger in early production, with the letters U and D outside of the bracing. The smaller tank had the letters UD in between the bracing.
Additional detail included a moulded hand brake on the chassis.
The chassis was bronze coloured.