Idk if it was the same in the away end, but the catering system in the West Stand at Brentford was brilliant. Pay at a machine (you can also pre-order food and drinks to collect at HT) you get a QR code, take it to get scanned and the pints are with you quickly. Didn't order food but imagine it works as they get a much better idea of how many items to prepare in a certain timescale. Would be surprised if we haven't looked into something like this.