LOL!
C, all trains south go via York - it's just that the Transpennine is direct and just stops there, whereas the East Coast Main Line trains from Darlington make you change trains in York to get to Leeds.
S, I'll be on the service from M'bro that gets into Leeds at 12:23 - I'll text you and let you know what coach I'm on, and save you a seat! I think it gets into York just before noon - 11:55, maybe?
So much for my plan to sleep in on Saturday - my coworker who does our evenings and weekends is off sick again, and I'm going to have to get up and go in at 9:30 to open up the library so that the library assistants can hopefully hold down the fort from 10 to 4. I warned them today that they'd be seeing me in PJs and with bedhead!