No. Most Unis I researched don't care about 1 more attempt although some may prioritise those who did it once and got the same grade as you who did it twice, also its only really when it becomes 2, 3 ,4 ,5 or 8 attempts it becomes a problem lol. But I'm guessing the really really really prestige ones that have major major competition will look at things like resits.
Plus don't worry a lot of people flop their AS and try again and there are people who take gap years before Uni so if your worried that by the time you get to Uni everyone will be 18, they won't.