I've been doing the same - Looking at booking options from Kings Cross rather than the coast. Yes, there are £24 tickets for the 17.53 and 18.39. Best priced is the 19.29 at £16.
Looking at train options for returning to London on the 2nd November. I'm considering tickets for the 17.35 from Doncaster. For those who have been there before, would you consider this is cutting it too fine seeing as the ground is a bit of a trek from the station?
The next train with...