I had no choice on Wednesday, at the Pre-Sale, but to buy standing tickets (as that was all that was offered) but I have severe back problems and really can't stand for any length of time so I really want to swap the tickets for seated ones. I'm new to this site and have no idea how it works but I guess there's some kind of Private Messaging facility people can contact me on? First come, first served, of course. No money invoilved and will meet at the venue beforehand to swap tickets for obvious security reasons.