<head spins>.
You'd need to get up very early in the morning having sharpened your pencils the night before to figure this out.
Last year, a few of us in ABZ were looking at options to travel to Chepstow for a cycling-related event, and the fares offered by the usual websites looked like we were bidding for the franchises, not a seat on the train.
Is there an opportunity here for a website with knowledge of all this nonsense to be able to do some kind if 'traveling salesman' best-price calculation, or is this NP-Hard?
Even if the calculations were to be NP-Hard, there's a finite number of rail stations in the UK.
Perhaps an effing great rainbow-table could be buit.