BTW, thanks BV.
It's something that I am going to seriously need to sit down and discuss with my GP, also. Being a GP he is quite well informed about the health issues that may or may not effect flying, for instance he told me that any form of heart problem = flying career over and I didn't know that before then (thankfully that doesn't apply to me).
Asthma barely effected me at all, in fact I can't remember a time that I was seriously ill with it at all as a child. I am being optimistic here and will presume OASC will look at applications on a case-by-case basis as opposed to looking at a script and saying, "you're in" or "off you go sunshine".