I've just been looking up rail fares for my Chessington run. Off-peak (when I go) it costs me £8.55 return. I've never really looked into a young persons rail card before, but I've worked it out and they certainly are good value. I worked out that to travel to Chessington, with a rail card, my fare would only be £5.70 for a return. (Obviously with the added £26 for a rail card). Now, I live 35 miles away, you can't argue with those prices!