I've discovered that my initial idea, of using a small wagon repair siding 'somewhere' in the Lilleshall system would be highly unrealistic due to the fact that the wagon repair facility at Lilleshall was somewhat massive.
As I find that I much prefer working on more realistic ideas I'm wondering about revisiting the Lawley Village idea, once again compressed (even more so this time), to fit the space given. Brake van rides would be the order of the day, with perhaps a little bit of wagon shuffling into the siding.
I'm also beginning to lean towards the idea of using three links, as all trains will be made up of loco + one item of stock.
Thoughts?