Hi Walter,
I am currently on target to get A's in chemistry, Biology, English lit + Lang. Business studies and music. And B's in Physics and Maths. I would like to be a vet, but I'm struggling with picking the right A levels. I've read on many Vet school's entry requirements that I would need A's in Chemistry and Biology and another in a subject that does not overlap? I find this quite vague and I am really confused in what my third A level should be. Does this mean I should go for a subject that I can achieve an A in?

As I understand it your best 3rd choice would be Physics or Maths.