Diesel 10 is an evil diesel who dislikes steam engines. He has a hydraulic claw named "Pinchy", which resides on his roof, and two bumbling side-kicks named Splatter and Dodge.
Diesel 10 was a very evil diesel on Sir Topham Hatt's Railway, He means trouble and causes trouble. He dislikes steam engines or as He calls them "Steamies" somehow Sir Topham Hatt usually stops him in his Tracks.
Diesel 10 is based on a BR Class 42 "Warship" with a added Hydraulic Claw. Which is a illegal modification.
After the end in Claw of the Law, Diesel 10 was scrapped for his antagonistic actions and never appeared in the series.