If the referee books the player in question , as he did on Saturday , and as with Capoue against Watford , does VAR get used to overturn the yellow card to make it a red ?
As in , at the moment if the ref does not see some thugerry during the game and does not book the thug , the thug can be disciplined and banned by the FA after , If the referee sees it and books the player no further action is taken.

The only comment I will make about the Zaha furore is that the MoTD pundits and others do not realise that just booking the players for the challenges like Saturdays and Capoue is not protecting him and sending out a message that you get one career threatening challenge on him before you get sent off, and just encourages others to do the same and encourages the rotational fouling.
I am pretty sure that if he had been playing for Man U or Chelsea there would have been two sendings off, and I think that what may well be the thing that eventually will make him move on.