Hey Shugs
Just wanna say I am in exactly the same boat as you, on my stage 3 and have been looking over pervious documents, !!!!!!!!!!!!!! and the graham duke book that was kindly given to me from Cardiff ATC.
I'm really struggling with plane recognition though, and am worried about how much in depth information they can expect you to know at this stage.
I have even started look at the manual of air traffic services.... is this perhaps a step too far?