Since you've had no replies yet, let me at least congratulate you. I know you will thoroughly enjoy yourself!
I do not know how merchandise pricing will play out on the next UK tour swing, but t-shirts are pretty much standard fare pricing as they have always been, I would rough estimate the equivalent of $30USD at maximum. If your country has some new fees established, who knows?!
And as far as any forum member attending, sometimes people may make plans approaching last minute, whether seeking tickets or liquidating tickets due to extenuating circumstances (life), or even simple announcements of attendance and/or questions, such as yours, regarding meet-ups.
Don't hesitate to re-post this or a similar note in the concert reviews section, which tends to double as a place to initiate pre-show meet ups, whether with or without suggestions, as well as the (highly valued by myself, especially glowing, but even negative ones) post performance experience details. The closer the date approaches things may coalesce into a real party on the horizon!
Rock ON & Leap Into The Faith,
Rocket
"He still doesn't charge for mistakes!
"
http://jbonamassa.com/tour-dates/"Everybody wants ta get inta the act!"
“Now, this isn’t your ordinary party crowd, here. I mean, there are professionals in here.”