'I would say that you are well informed - bravo - but I doubt that all RAF Flight Lieutenants are...but we have no way of proving this because a) you aren't one and b) even if you were one you wouldn't be all of them c) it'll take a while to ask them and d) if we do it via this forum they can scuttle off to google and find out.'
I could name lots of Flt Lts that pride themselves on not being in the military and so wouldn't have a clue what a FH70, AS90, CR2 or CVR(T) is, nor would they be worried about it.
Ho hum!
G