All you need is 1 person upstairs watching the game with the ability to instant replay that shit. For example the England goal, he sees it, watches it over 1 time, then contacts the referee on the field through the headset and says to the guy, "Hey, you fucked up that's a goal."
It won't disrupt the flow of the game, only make it used for big calls(offsides, goals), and not for fouls.