Wow what a hot topic! At my RAF civil manned unit we still have QGHs and Spiral Descents!! All Mil IAPs are flown on QFE, which seems to make sense to me as under a high workload, the man in the hot seat in the sky (who is after all our raison d'etre) doesn't have to think about whether he's about to hit the floor or not. Correct me if I'm wrong, but I believe both civil and mil IAPs give both altitudes and heights on approach plates, so the pilot can in fact please himself. The ATCO, I think, should, and generally does, carry out any correction required for separation, as he/she already does on low pressure days between highest Alt and lowest FL.
As for separation, we can only apply 500' between mil flights. Civ vs civ or civ vs mil get MATS1 standard separation.
And I also believe I'm correct in saying that MATS1 states that all a/c are to be given QFE before commencing Final Apch, unless the pilot has stated, or it is known that the pilot/operator lands QNH.
Hope I haven't left myself open to a broadside.......
