A few more ideas.  Unusual wagon loads are popular enough, but how about an old, or damaged, wagon or locomotive going to the scrapyard?  These are all American pictures.  I looked hard for some UK equivalents, but couldn’t find any.  Maybe our smaller loading gauge prevents this?  Anyhow, it might make good use of some damaged or failed model.

Of course, ESNG has already done this, sending Thomas to the scrapheap…