I hate to say it to those who can't stand the subjects, but Maths and Physics are the two A level subjects which will help you most when it comes to your eventual aviation studies. There is a large overlap between the applied part of A level maths and A level physics in any case so it is two A levels for the time needed to study one and a half!. .The problem is that there are few real physics teachers in schools who really understand the subject well and therefore can communicate their understanding to their students. As an ex- Physics teacher I have had great pleasure in explaining the real difference between amps, volts, ohms, coulombs, watts and joules to my F/O at 18000 feet! The wonderful thing was that after the flight, he really understood it - at last.
best of luck