Gogz - Google CAP493 and you will find Manual of Air Traffic Services Part 1, downloadable as a pdf. You will find all you want to know in there and a lot you didn't. Don't get too deeply involved with its content, not necessary. BUT one day you may have to learn most of it ...
GONZO, you are a cruel so-and-so
Dave S
(Ex-No 12 Cadet Course)