I did my PPL 5 yrs ago but I don't remember having to know any of the AICs. Surely the CAA has produced mountains of AICs?? How can anybody absorb that stuff?
The exam content is based on the standard books like Trevor Thom (or perhaps vice versa). A lot of it is silly stuff, word plays which rely on having read the right books, so one does have to read the questions carefully.
The PPL Confuser is the very best revision book. Get 90% in that (not easy) and a very good exam pass is a sure thing.
As regards stuff changing, not a lot of this stuff has changed since WW1
The only thing like that that I recall was the IMC Rating exam where the questions were based on a specific chart having certain magnetic variations, so the school has to lend you the original (out of date) chart for the exam.