The period of notice given to Recruits is worked out by an RN Writer on the Gammadex mainframe at Centurion using the following formula;
Either that or they throw a dart at the Pirelli calander on the wall.
We normally allocate candidates at least one term in advance. There are 3 terms - April to August, September to December and December to March. So it depends when you are joining, but on average you get 3 to 4 months notice. I've just told a lad he's got a date in July. That said if you want to get in quick then sometimes people drop out at short notice (less than a month). So it depends on the circumstances, but certainly normally over 1 month.