“"It's not fair!"
"What isn't fair?"
"Letting Branch Line diesels pull Main Line trains."
"Never mind, Gordon. I'm sure BoCo will let you pull his trucks sometimes. That would make it quite fair."
"I won't pull BoCo's dirty trucks! I won't run on Branch Lines!"
"Why not? It would be a nice change."
"The Fat Controller would never approve! Branch Lines are vulgar!"”
―Gordon and Edward arguing about BoCo and branch lines

Main Line Engines is the twenty-first book of the Railway Series.

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