I just heard ITV bloke say that there's a line where it's a shove and a foul but that isn't defined in the rules. EXACTLY, and that's where VAR doesn't help
For my own mind though, do we know what the chats are like. I hope it's similar to the way we review decisions in recent years. The ref needs some input before the screen bit happens, so I hope they're like the following
VAR-avan (like caravan, it's a pun): Did you see the push
Ref: Yup, was it far worse than I thought?
VARavan: Yup, you should squint
Ref: Cheers, will do
VARavan: Did you see the push
Ref: Nope, I'll have a look
VARavan: Did you see the push
Ref: Yup, was it far worse than I thought?
VARavan: Nah, your call
Ref: We'll crack on then
edit: copy and paste rammed that point too far