saudi pc 9, I was winding you up.
I don't know the real reason why the latest age to start training in the RAF is 24 but I have an idea.
1. The success rate for pilot trainees falls well short of 100%. Experience has probably shown that the success rate drops significantly with increasing age over 23. That would be one reason for setting 23 as the entry limit.
2. Then there are something like 10 applicants for each slot. In other words demand exceeds supply so we do not need to consider 'higher' risk candidates.
3. What of 'special' cases? Same answer really, we have sufficient 'normal' demand and do not need the additional staff work involved in considering special cases, ie Condition 2. Weak answer I know and there is an entry stream for re-entrants and older candidates with special qualifications so really Condition 1 applies for pilots.