FALTAHAN -
I can answer just one of your earlier questions - the one about the turn initiation off 31L.
As Bellerophon noted in a distant earlier post, we 'bugged' 20ft on the rad alt for this departure. As one climbed through 20' the DH light would go out and, subject to the gear being selected up, and V2 being achieved (that normally happened at about the point of lift-off), and a definite positive rate being achieved, the turn was initiated then. In deference to the low level we rolled gently, 6secs to achieve 25 degrees, but it's still a great testament to the handling qualities of this machine that we would initiate this turn - in any weather - at a height I'd be most uncomfortable if doing the same thing in a single-engined tourer.
So - in short - forget QFE; the answer is a height of 20ft.
Hope the PPL is coming along well, keep us posted.