Outside of their headline courses, (CompSci, Maths, Economics etc), I suspect Warwick are as lenient as most other comparable unis. I think you would have a fair chance of being accepted even with A*BB achieved, but as others have said, there is a risk and it is dependant on how many spaces they have left which no one can predict.
I always tell people that the objective at this stage is not to get five offers, and that they should be a bit ambitious with at least one choice.