Duck

Montague, affectionately known as "Duck" because of his supposed waddle, is a green pannier tank engine. Duck runs his own branch line with [Oliver]. He holds great pride in being Great Western and this results in him having a strong work ethic. This can, however, be a cause for friction with his colleagues, when he insists that his way is the only right way to do things.

In the Railway Series, Duck has two Great Western autocoaches named Alice and Mirabel. In the television series, he has three Great Western Slip Coaches.