Easy for me in Kop block F, used the bar code and straight in ( android phone). Nephew on IPhone same, his was distributed from a mate.
35 minute queue for a pint was ridiculous . Why they can’t have a few hundred pre poured and ready is a mystery, and get a system going where one pours, one takes payment etc. It also needs a steward near the kiosks, too many trying to push in, going to end badly one of these days.
Few gaps in main stand noticeable though.