I don’t know how to use formation designer but I created one with the Class 387/2 and the 150/2 REG yesterday the 150/2 Mixed New TFW Red Arriva...
Maybe I would also suggest London Marylebone to Birmingham By adding the Class 68 as a add-on
I would love The Previous Chiltern 172 on Train Sim World 4 pls and definitely the 168s I want as well
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