Maths wise, I don't see how you can get along without at least understanding trigonometry and transformations.
Physics is largely common sense. Of course, the areas that aren't readily deducible without specific understanding will not be overlooked by the CAA.
My advise, is be able to work things out from first principles. This helped me as I simply could not memorise everything.
To answer your question: Brush up on those basic elements of maths now, deal with the physics as you go. If you can memorise the equations and know how to manipulate them, then you can pretty much forget about trying to remeber answers for a significant volume of the work.