Strangely I seem to be able to find nothing decent and cheap on the way there, but plenty of obscenely cheap prices on the way home (think £12 to get from Blackburn to Haywards Heath!). The only route I can see cheap in the morning is one that involves several changes (and probably crap uncomfortable trains), whereas the way back seems to be a nice uninterrupted journey (perhaps on a nice intercity train!). What to do?!
Not Blackburn, but i got cheap Wolverhampton train tickets for £14.50 there and back from Eastbourne with my railcard, shouldnt be much more without one either !!