Yep ref could make a signal to say it’s being checked by var and do nothing at that point.Just said to my ERO five mins after the sending off that Vardy was hobbling around making it look as though he's terminally injured and the sending off was correct.
What I don't understand about VAR is that the decision is made and then checked. Why not make the decision AFTER you've checked it!
Then var can tell the ref to go and look if they are unsure.