Isobella is a vintage lorry who transports cargo on her flatbed and works with Jack, Alfie and the other members of the construction team. She is a hard worker, but does not like to get dirty. Isobella doesn't think of herself as one-of-the-boys -- she's a girl and proud of it! With her bright yellow paint and number 22 on her sides, Isobella is ready to hit the roads.
- Henry and the Steamroller (cameo)