Cement Mixer
Built by Adrian Ashford in January 2018
This is based on a model in the 1954–61 № 2 outfit manual, though judging by the illustration, it looks as if it could well have been carried over from an earlier, even pre-war, manual.
I made some modifications to the original design, including fitting one of those black 6V motors in the engine unit to drive the drum, through a worm-and-pinion and rubber band.