Alice and Mirabel are two Great Western autocoaches pulled by Duck on his branch line. They were rescued from scrap by Sir Topham Hatt, along with Dulcie, and given to Oliver to use on the Little Western.
Around the time of Oliver, Isabel, and Toad's arrival on Sodor, the Fat Controller was in the process of re-opening the Little Western line between Tidmouth and Arlesburgh. He assigned Oliver and Duck to the line, but the only coach was Isabel. The Fat Controller was able the rescue three more autocoaches like Isabel. Two of the coaches, Alice and Mirabel, became Duck's coaches while Dulcie joined Isabel and Oliver.