The Mainland Engines are engines who work on the Other Railway.
These engines work on the other railway. Even though they have not appeared visually in Thomas the Tank Engine Wooden Railway Adventures they can be presumed to be friends of Diesel 10, Bowler, Spamcan, Splatter, Dodge, and Dart, and Sidney.
They were mentioned in the special Hiro's origins.
- Stepney (formerly)
- Flying Scotsman
- Logan (formerly)
- The Mainland Diesels
- Hiro's Origins (mentioned)
- Oliver's Eleven (Connor and Caitlin only)
- Saving Pirate Ryan (Merlin only)
- They have not appeared visually in Thomas the Tank Engine Wooden Railway Adventures, but may be used from extra engines from Keekre24's collection (2013 model of D199).