I think from the photo I have cracked the code. Class 141 and therefore is West Yorkshire as there are many big stations like Bradford, Leeds, York etc and can have a lot of locos. I am open to discussion but these are my thoughts.
This is already under discussion in other threads. The clues point to a route serving Blackpool, North and possibly South with a strong likelihood the Preston to Ormskirk section will make up the remainder of the mileage.
As much as I would love it to be west Yorkshire, I believe it will be preston-blackpool south and north with the class 142 due to the leak on epic