The scrap diesel of the Duckeychev Scrapyards, Diesel 10 is known to be a big bully. With a massive hydraulic claw on his roof, his main job around the scrapyard and railway is to pick up scrap and load it up, but he also handles heavy goods and demolition work. He may come off as intimidating, but will often bring about his own downfall in a goofy manner! Despite his mean exterior though, he's got a good streak deep down in his engine.
Diesel 10 is based on a BR Class 42 diesel-hydraulic with an added non-regulation hydraulic claw. All but two members of the class were named after Royal Navy warships, so they, and the similar Class 43, were nicknamed "Warships". Two of these engines are preserved.
Diesel 10 is painted ochre with tan stripes along his sides. His buffers and "Pinchy" are painted dark brown.