Well, I disagree partly. I am currently doing Physics and maths A level, and they are both quite relevent to aviation. It is worth thinking about whether you'd be better to go for a degree, so that you have something to fall back on if u fail a medical or something along the line. And you cant fail physics anyway really, its not too hard, and A levels are only slightly harder, if not less material than what you'd have to learn for the ATPL exams. I'd still go for whatever you feel comfortable with, however physics would be a little more helpful than history!