Just watched sky sports highlights.
Can see why its upgraded, but at the same time is it really clear and obvious when it was already clear and obvious to the referee to go yellow with it yards in front of him? That is literally the definition of re-refereeing. It is one of those decisions that he will go yellow and let VAR deal with it to upgrade or not. Again, one of those once he has been sent to the monitor he is going to change his mind and not have a back bone and say "no, I was yards away, unobstructed, and not changing my decision".
In my opinion, he clearly lost his match control from this point as to then go on and show something like 10 yellow cards from this. To have Martinez shove Maupay to the floor (even if it was weak) and then Literally grab him by the shirt collar to drag him up and only get a yellow is farcical, but to send off Kamara for shoving a Brentford in the chest (the same thing Martinez done to Maupay that kick started that melee).
Also, a penalty not given, or apparently looked at before Brentfords first goal. McGinn not even looking at the corner coming in, eyes purely for Mee and grabs Mee and wrestles to the floor.
Very poor officiating from those highlights, both on the pitch and in the VAR room.
I really think it is about time field referees grew a backbone and told VAR to shove their review.