Wheezer
I got in as Nav in 1990 and knew I was a wheezer. Declared it in '97 and much to my amazement no one was too bothered! Kept flying etc etc!
Some would say what a terrible person I was for not declaring it at interview blah blah blah..... Some would say if you want it enough you will do anything to get it.
I wanted it and I got it. Simple.
Its your choice. If you declare it at initial medical and want to be aircrew you will be shown the door.
The RAF doesn't have a problem with the fat, lazy, obese lard arses that can't see their own show laces let alone actually be able to bend over and tie them that seem to have crept into most branches. Why should a little wheeze hold you back?
Don't know if this helps but it worked for me!