In late 1919, 6 old and condemned brake vans were converted to well-trucks to carry small electricity transformers up to 10 tons (larger transformers being handled by bogie well wagons). Numbered 94670-5, these distinctive wagons had an octagonal well between the frames and the wheels, while the deck was simply planked over. Brakes were only fitted to one side, and unusually, a brake lever was also only fitted to one side. They were all finally condemned by September 1940.
This kit comes complete with a Parkside Dundas 12ft chassis which needs some minor conversion as the Mayfly was a shorter wagon.