Ben is a yellow tank engine twin along with Bill they work for the Sodor China Clay Company, near Brendam, though they have also been known to work at Centre Island Quarry. They enjoy playing tricks and being cheeky to bigger engines.
Bill and Ben are two saddle tank twin engines. Completely identical, they work at the China Clay pits near Brendam Bay on Edward's Branch Line, pulling their loads for the Main Line engines and ships in the harbours. They are a mischievous pair, who love playing jokes and teasing the other engines - especially Gordon. The twins are also frequently used in other Quarries across the Island, often found working with Mavis at the new Centre Island Quarry, and have been used to shunt in the Harbour yards when needed.
Bill and Ben are based on the Bagnall 0-4-0STs "Alfred" and "Judy" of Par, Cornwall, who are both preserved and in working order at the Bodmin and Wenford Railway.
(Bagnall 0-4-0ST "Judy"
Bill and Ben are painted yellow with red lining and black wheels.
Bill and Ben both have brown nameplates with yellow writing, "SCC" written on both sides in yellow and "Brendam Bay" on the front of their saddle tanks. They have number plates reading 1 and 2 respectively above both the back of their cabs and their faces.
- A behind the scenes picture reveals that Bill and Ben were to have numbers on their smokeboxes above their faces.