New season ticket holder this year - and never intending on giving it up now. Selhurst is a hell of an experience. I have 1 junior and 1 adult season ticket to go with my son or daughter, but for the Liverpool game neither of them can come so I'm planning on going with a friend. Is this just a matter of going to the box office before the game and paying the price difference? Fairly easy to do I hope as a one-off? Secondly, do you know if the box office on the Arthur side does this or do I need to go to the main one? Cheers and thanks for your help.

Carl