So after all that, we are saying that the guys in the RAF spoke to their mates about what to expect at the interview. Not exactly a huge revelation.
What you will find, is that on a squadron where you all know each other, and meet up regularly, people will go out of their way to help mates with interview questions and tests. This is really a reflection on the camaraderie felt amongst military pilots.
With the large number of RAF pilots leaving at present, no wonder a large pool of knowledge is being collected.
People leaving any airline could do this to their previous colleagues(and may do for all I know).