Kat, this is looking amazing.
Sadly I've recently lost my family connection with area. Was brought up in Parbold, have many a happy memory waiting on Wallgate waiting for my train home whilst watching various trains thunder across the West Coast mainline.
Just got back into the hobby, I've done an 8 x 4 board and am starting to plan something much bigger. I'm going to model both Wigan stations and model Parbold station also, set in the late 1980s, it's going to be a rather large project! I am lucky to have the space. The Wigan aspect won't be any where the detail you've created though!
Keep up the good work. :)