Mmm... Deltics. I second this suggestion of course and, at the risk of appearing self serving, offer this video of all the preserved examples: Yes the captions go by too fast. YouTube has removed the pauses so you'll have to have your finger poised over the space bar if you want to read them.
Yeah I would love to see Deltics, and they have done stints on the TP route too, although I think that was 1981