Hi there, i've been in the reserves just under a year now, and from what i understand it's only the individuals that are going regiment that have to undergo the swimming test, that was the case when i did my 2 weeks at Halton anyway! (If anyone else knows any different please correct me).. also in the reserves it is more of a fitness "assessment" than test so it is not the end of the world if you fail it, as long as you are close. In the regulars if you fail the fitness test you cannot join up in 99% of circumstances but because the RAF are in need of reservists they are not as strict, depending on your branch of course!