|This article is about 'the Little Blue Tank Engine'. You may be looking for 'the Little Blue Engine, or the number 1 little blue tank engine'.|
The Little Blue Tank Engine once shunted James's good train for him, and teased him about the incident when James needed bootlaces to mend a hole in his coaches. He ran off laughing rudely, leaving behind a very angry James. It is unknown what happened to the engine afterwards.
The tank engine is painted blue with red lining.
The tank engine's basis is unknown, but he appears to have side tanks from his cab to half-way along his boiler and might have a 0-6-2 wheel arrangement. He also resembles a North Eastern Railway N8/N9/N10 or a London, Tilbury and Southend 69 Class tank.
- In the television series adaption of Troublesome Trucks and magazine version, the tank engine's role was replaced by Thomas. In the James the Red Engine and the Troublesome Trucks, the role was replaced by the Dark Green Tank Engine. In the Engine Adventures book, James, the role was replaced by Charlie.
- In Toby the Tram Engine, a similar looking blue tank engine appears with the Breakdown Train after James collides with some tar wagons. It is unknown whether or not this is Thomas, or the same engine.