If you suffer from asthma or have done in the past, you cannot be considered for flying branches of the RAF.
Taken from the document
THIS PAGE ON THE RAF CAREERS WEBSITE refers to.
It seems they have gone to hard rules in these hard times.
I can now run the 1.5 mile run in 11mins 30 secs with is 41 secs under the required time (proof enough that asthma is not an issue for me)!
Distinctly different demand on the body to breathing through a mask whilst flying at altitude. I think a more scientific approach is usually employed to assess such things.