Bill and Ben

Bill and Ben are tank engine twins who work with Mavis at the Ffarquar Quarry, and are friends with Diesel 10. They were voiced by TheRedEngine.

Bio
They have played a trick on Diesel 10. They thought he wanted revenge, and hid from him, until they found out Diesel 10 only wanted to tell them that he was impressed by how they did the trick. They spent the rest of that day tricking other engines.

Personality
Bill and Ben love to play tricks on the other engines and are very naughty and cause confusion and delay very often, such as making Connor running a red signal.

Basis
Bill and Ben are based on Bagnall's 0-4-0STs "Alfred and Judy."

Appearances
They were mentioned in the cancelled episode Gordon at the Quarry.
 * Season 1: Bill, Ben and Diesel 10