I’m guessing the flight time prohibits this, will the stock be on board, what about irrops or aircraft swaps or passengers changing the flight on the day.

I do think however at the time of booking or on,Inez check in you can purchase a prepaid voucher for say a hot drink and snack or sandwich and beer etc as this surely has got to make processing payment quicker and saves the problem of say school kids travelling with no card or an elderly person whose luggage is in overhead locker or someone who only has an authorise all transaction card typically found on basic bank accounts thst don’t allow offline transactions to be processed.

I was on a packed A321 to Manchester the other day and trolley made it through but not many people purchased of course this was only 28 mins wheels up to landing.