That's not a bad idea. It works very well since I we only know that Arry and Bert only pull goods trains on The Thin Git's Railway and would also explain why they don't work at scrapyards anymore.
@TheLondonTransportPannierАй бұрын
Techinally, they work in a dump now. Also, Derek's Derring-Do mentions some scrapyard diesels. We don't know who they are.