I haven't read every response so apologies if you've already said but why do you want to take Physics/Maths if you plan on doing Law at uni? There is of course absolutely nothing wrong with taking these subjects even if you want to do law but if you are having serious doubts about them, then do not take them, as you might regret it!! Yes, maths and physics are very difficult, I am currently taking them, but I can imagine English Lit being very hard too, they are difficult in their own ways. I would personally recommend taking more essay based subjects if that is your passion and future plan at uni, but you may want to take Maths too and drop it after your first year at AS (if you still can!), as it can still be a useful AS level to have.