If they need the course filling up, they may accept slightly lower. If you're unsure, call them and ask.
It depends on the rank of the university a bit too, but for unis asking AAA they typically have enough applicants with said grades to expect that and up. Contact them if in doubt and ask
How important are predicted grades? Will a university reject my application completely if I fall short in one predicted grade? Say if the university wants AAA and I am a ABB or AAB will they not even consider me/give me an offer? Or is it all based on your personal statement too?