Please could someone give me a list of the permitted routes for a Not London SPR between Stevenage and Grange-Over-Sands. The way out is taken care of, Leeds and Preston via the Calder Vale, but I'd like to take a different route on the way back. They originally wanted to send me via the Little North Western, but two hours on a Pacer is a bit much. I've never covered either of the TPX routes, and the southern one seems most interesting.