How Are AAA and AAB considered in the UK?

Those would be considered good results. Depending on exacty what subjects you're looking at they will get you into a lot of good universities, if not the very top ones.

Thank you, regarding the grades idk I mean it’s very different in Italy. I studied languages but I have also done scientific subjects and I applied for science courses. My grades are:
9/10 in Maths which would be A I guess
9/10 in Physics (same)
8/10 in Science (in Italy biology and chemistry are considered the same subject) which is a B+ or a B I guess...

Last year I had:
10/10 in Maths = A*
9/10 in Physics= A
9/10 in Science= A

I applied to UCL, KCL, and Royal Holloway... with AAA and these grades (but not a very beautiful ps) how many chances do u think I have?