For anyone interested , this topic is being bashed around on the yahoo microlight group. The issue seems to be that a lot of the newer craft can be supplied as either Group A (there I used it) or microlight, and rather than deal with PFA for one and BMAA for the other, prolly all suppliers would plan to use the PFA if they are the only org who can support cert on both - thereby depriving the BMAA of a big piece of its revenue stream. If the BMAA elects to seek support status for Group A as well, then it can protect its position in theory.
I am a BMAA member, and have nothing but praise for them (in common with the vast majority of members) - I am an ex-PFA member, dropped it because (with the notable exception of the engineering dept) they seemed more interested in shooting from the hip first before answering questions.
If there is any flaw in the reasoning above, I and other BMAAers would be delighted to hear it.
A