Duncan means well, but will "Rock 'N' Roll" whenever the mood takes him. He tends to have a mind of his own which makes him obstinate and rude on occasions. He has a great big heart, but is a little misguided. Duncan is now a part of Sir Topham Hatt's narrow gauge railway of which he feels he is very overworked.
Duncan is based on a narrow gauge, industrial tank engine built in Scotland at the time of the First World War.
- Duncan (1996)
- Limited Edition Metallic Duncan (1998)