The Ladle trucks (also known as slag wagons) are rolling stock used for transporting slag.
These trucks are used at the Steelworks on the Mainland. There is a chute, which opens up to allow slag (leftover waste from the steel processing) to slide down along a path, before splitting into three branches, allowing the slag to be poured into the ladle trucks, ready for transfer. The steelworks engines' main job is to transfer the leftover slag onto the slag heap embankment at the back of the building, from which workmen pull the lever on the ladle trucks to empty the slag onto the slag heap.
The ladle trucks are painted rusty brown with red wheels and hazard-striped buffer beams. Some of them are also painted blue.