That would depend on why you have no predicted grades.
If you're resitting A levels, and are doing so independently (no school / college / tutor) then unis are well aware that it'll be challenging to get updated predictions and will probably make assumptions about your likely grades based upon your original grades and the extra year of study.
Similarly, if you're home-schooled, with no tutor, then even if you're not a resit candidate, they might be willing to accept the lack of predicted grades.
However, if you're attending school / college and there are no predictions accompanying your application, that will look very strange indeed. They may well be unwilling to make an offer under these circumstances.
By the way, just to clarify, you don't provide predicted grades anyway. Your referee does.