Gertrude and Millicent are two coaches rescued from the Mid Sodor Railway which the Skarloey Railway restored while Skarloey was being mended. They run on bogies, which led Sir Handel to consider them the only "proper" coaches on the railway. Millicent has a small covered compartment for a guard where they can sell tickets, although Peter Sam doesn't like that as he feels that guards need vans.
Gertrude and Millicent are based on the Talyllyn Railway's ninth and tenth carriages, respectively.
Gertrude and Millicent are painted blue and cream.
- The Little Old Engine (do not speak)
- Gallant Old Engine (cameo)
- Great Little Engines (one makes a cameo)
- New Little Engine (cameo)